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Boeing ALTEON 777 Training Manual

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777

Training Manual

THIS MANUAL IS FOR TRAINING PURPOSES ONLY.

NO MAINTENANCE ACTION SHOULD BE TAKEN AS A RESULT OF INFORMATION CONTAINED IN THIS MANUAL.

ALTEON PROPRIETARY RIGHTS ARE INCLUDED IN THE INFORMATION DISCLOSED HEREIN. R

,

,

ECIPIENT

BY ACCEPTING THIS DOCUMENT

AGREES

THAT NEITHER THIS DOCUMENT NOR THE INFORMATION DISCLOSED HEREIN NOR ANY PART THEREOF SHALL BE REPRODUCED OR TRANSFERRED TO OTHER DOCUMENTS

A

.

OR USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR FOR ANY OTHER PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING BY

LTEON

UNPUBLISHED, ALL RIGHTS RESERVED UNDER COPYRIGHT LAWS (

) 2003 A

T

L.L.C

C

LTEON

RAINING

This manual has been prepared by Alteon Seattle, Washington for the

Boeing Commercial Airplane Group.

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Page 1 OR USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR FOR ANY OTHER PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING BY LTEON UNPUBLISHED, ALL RIGHTS RESERVED UNDER COPYRIGHT LAWS ( ) 2003 A L.L.C LTEON RAINING This manual has been prepared by Alteon Seattle, Washington for the Boeing Commercial Airplane Group.
Page 2 This page is intentionally left blank...
Page 3 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page HYDRAULIC POWER -- INTRODUCTION ....... . 29-00-00 . . 1 COMPONENT LOCATIONS .
Page 4 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page CENTER HYDRAULIC ISOLATION SYSTEM - FUNCTIONAL DESCRIPTION ..... .
Page 5 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page GENERAL - INTRODUCTION ........
Page 6 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page MLG UPLOCK ASSY, UPLOCK ACTUATOR, AND UPLOCK-OPERATED SEQUENCE VALVE ....202 MLG DRAG BRACE-OPERATED SEQUENCE VALVE .
Page 7 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page LANDING GEAR DOOR CLOSED SWITCHES ........
Page 8 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page MLG TRUCK TILT PRESSURE SENSORS ........
Page 9 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page COMPONENTS ..........
Page 10 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page BRAKE METERING VALVE ASSEMBLY - FUNCTIONAL DESCRIPTION ......
Page 11 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page AUTOBRAKE VALVE MODULE ........
Page 12 777 TRAINING MANUAL Alteon FS733 Chapter TABLE OF CONTENTS Section Subject Subject Page INDICATIONS ..........
Page 13 777 TRAINING MANUAL HYDRAULIC POWER -- INTRODUCTION General Hydraulic Indicating System Three hydraulic systems supply pressurized hydraulic The hydraulic indicating system shows these hydraulic fluid for power to these airplane systems: system indications in the flight compartment: Flight controls System pressure Landing gear actuation Pump pressure Main gear brakes...
Page 14: Training Manual
777 TRAINING MANUAL HYDRAULIC POWER -- INTRODUCTION ASCPC - air supply and cabin pressure controller - nose gear - center - nose landing gear capt - captain OPAS - overhead panel ARINC 629 system - case drain - power control unit CHIS - center hydraulic isolation system - primary flight computer...
Page 15 777 TRAINING MANUAL HYDRAULIC POWER USER SYSTEMS: LEFT SYSTEM - FLIGHT CONTROLS - LANDING GEAR ACTUATION CENTER SYSTEM - MAIN GEAR BRAKES - MLG AND NLG STEERING RIGHT SYSTEM - LEADING EDGE SLATS - TRAILING EDGE FLAPS MAIN HYDRAULIC SYSTEMS - THRUST REVERSERS - TAIL SKID HYDRAULIC INDICATING...
Page 16 777 TRAINING MANUAL HYDRAULIC POWER -- COMPONENT LOCATIONS General Center Hydraulic System Hydraulic system components are in these locations: Most center hydraulic system components are in the right wheel well. These components include: Left and right engines and aft strut fairings Right wheel well A hydraulic reservoir Aft wing to body fairings...
Page 17 777 TRAINING MANUAL RIGHT SYSTEM COMPONENTS HYDRAULIC GROUND SERVICING EQUIPMENT HEAT RAM AIR EXCHANGERS TURBINE HYDIM CARD HYDRAULIC ACCUMULATORS CENTER SYSTEM COMPONENTS LEFT SYSTEM COMPONENTS HYDRAULIC POWER - COMPONENT LOCATIONS 29-00-00 - 5 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 18 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- INTRODUCTION General PFCS Right thrust reverser The left, center, and right hydraulic systems operate Normal brake system. independently to supply hydraulic power to the airplane systems. All three systems operate at 3000 psi nominal Center System pressure.
Page 19 777 TRAINING MANUAL LEFT SYSTEM CENTER SYSTEM RIGHT SYSTEM (RED) (BLUE) (GREEN) AIR- AIR- DRIVEN DRIVEN LEFT RIGHT PUMP PUMP ENGINE ENGINE (ADP) (ADP) TURBINE (RAT) ENGINE- ENGINE- MOTOR DRIVEN MOTOR MOTOR DRIVEN MOTOR PUMP PUMP PUMP PUMP PUMP PUMP (ACMP) (EDP) (ACMP)
Page 20 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- INTERFACES General Air Data Inertial Reference Unit (ADIRU). Four hydraulic interface module (HYDIM) cards are the Hard-wire Interfaces interface between the hydraulic systems and other airplane systems. The HYDIM cards also have these interfaces through hard-wires: The HYDIM cards receive and transmit data through the ASG cards and the systems ARINC 629 buses.
Page 21 777 TRAINING MANUAL ELMS PSEU (2) FSEU (2) HYDIM L L ASG OPAS HYDIM CL R ASG HYD SYSTEM COMPONENTS FLIGHT CONTROL S/O VLV (6) P85 SYSTEMS CARD FILE - LEFT TRUCK TILT PRESS SENSOR (2) APUC ELMS L ASG HYDIM R ASCPC R ASG...
Page 22 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CONTROLS General Engine Fire Switches The controls for the hydraulic system pumps and the RAT The engine fire switches isolate the engine if there is manual deployment are on the hydraulic/RAT panel. This an engine fire.
Page 23 777 TRAINING MANUAL RAM AIR TURBINE PRESS UNLKD HYDRAULIC ELEC L ENG R ENG FAULT FAULT FAULT FAULT L ELEC R ELEC AUTO AUTO AUTO AUTO FAULT FAULT FAULT FAULT HYDRAULIC/RAT PANEL (P5) ENG BTL ENG BTL 1 DISCH 2 DISCH DISCH DISCH ENGINE FIRE SWITCHES (P8)
Page 24 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC INTERFACE MODULE CARDS General Training Information Point Four hydraulic interface module (HYDIM) cards supply The HYDIM cards are software loadable. See the CMCS control, indication, and other functions to the section for more information about the data load (AMM hydraulic system.
Page 25 777 TRAINING MANUAL P85 LEFT SYSTEMS CARD FILE - HYDIM L - HYDIM CL P84 RIGHT SYSTEMS CARD FILE - HYDIM R - HYDIM CR INBD INBD MAIN EQUIPMENT CENTER MAIN EQUIPMENT CENTER RIGHT SIDE (LOOKING FORWARD) LEFT SIDE (LOOKING FORWARD) P85 LEFT SYSTEMS CARDFILE HYDIM CARD (TYPICAL) (P84 RIGHT SYSTEMS CARDFILE SIMILAR)
Page 26 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC INTERFACE MODULE CARDS - FUNCTIONAL DESCRIPTION General Reservoir quantities RAT locked status Four HYDIM cards in the system card files monitor and Valve positions. control the hydraulic system and do other functions. HYDIM also does these functions: The HYDIM cards send and receive some data through ARINC 429 buses to the ARINC signal gateway (ASG)
Page 27 777 TRAINING MANUAL NLG SEL/ BYPASS RAM AIR VALVE TURBINE PRESS UNLKD MLG SEL/ BYPASS VALVE HYDRAULIC RESERVE ELEC ISLN VLV R ENG L ENG OPAS AIMS ELMS FAULT FAULT FAULT FAULT NG ISLN VALVE L ELEC R ELEC AUTO AUTO AUTO AUTO...
Page 28 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC SYSTEM RESERVOIRS THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 16 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 29: Training Manual
777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC SYSTEM RESERVOIRS Purpose The right hydraulic system reservoir is in the right engine aft strut fairing. The hydraulic reservoirs supply pressurized hydraulic fluid to the hydraulic pumps. The reservoirs also get The center system reservoir is in the aft part of the the return hydraulic fluid from the airplane systems right wheel well.
Page 30 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC SYSTEM RESERVOIRS Training Information Point To lower or drain the reservoir fluid level, refer to AMM 12-12-01. You get access to the left and right reservoirs through the aft strut fairing doors on the two sides of the aft engine struts.
Page 31 777 TRAINING MANUAL PRESSURE RELIEF VALVE SIGHT GLASSES LEFT OR RIGHT HYDRAULIC QUANTITY FLUID RESERVOIR TRANSMITTER RETURN TEMPERATURE SAMPLE TRANSDUCER VALVE ACMP FLUID EDP FLUID SUPPLY SUPPLY DRAIN VALVE ENGINE STRUT LEFT AND RIGHT HYDRAULIC RESERVOIR CENTER HYDRAULIC PRESSURE RESERVOIR RELIEF VALVE RESERVOIR DRAIN VALVE...
Page 32 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- RESERVOIR PRESSURIZATION MODULE AND SHUTOFF VALVE General The center system module is on the aft bulkhead in the right wheel well. The reservoir pressurization modules supply airplane bleed air to the reservoirs. The shutoff valves are near the pressurization modules. The reservoir pressurization shutoff valves are Operation manually operated valves which permit the shutoff of...
Page 33 777 TRAINING MANUAL RSVR PRESS RSVR PRESS RSVR PRESS SHUTOFF VALVE SWITCH MODULE RSVR PRESS SWITCH CENTER HYD (HIDDEN) SYS RSVR RSVR PRESS SHUTOFF RSVR PRESS VALVE MODULE INBD CENTER SYSTEM MODULE AND VALVE ENGINE STRUT (RIGHT W/W - AFT BULKHEAD) RESERVOIR PRESSURE CHECK...
Page 34 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ENGINE DRIVEN PUMP Purpose Functional Description The engine driven pump (EDP) is the primary pump for The engine main gearbox turns the EDP when the engine the left and right hydraulic systems. turns. When the depressurization solenoid valve is not energized, pump pressure output goes to the hydraulic Physical Description system.
Page 35 777 TRAINING MANUAL PRESSURE BLOCKING VALVE DEPRESS SOL VALVE SUPPLY ENGINE MAIN GEARBOX (LOOKING FORWARD) PRESSURE COMPENSATOR HYDRAULIC FLUID SUPPLY LINE OUTPUT PRESSURE LINE CASE DRAIN LINE RETURN DEPRESSURIZATION SOLENOID CASE DRAIN EDP - SCHEMATIC ENGINE DRIVEN PUMP MAIN HYDRAULIC SYSTEMS - ENGINE DRIVEN PUMP 29-10-00 - 23 - ALTEON PROPRIETARY.
Page 36 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ENGINE DRIVEN PUMP - SUPPLY SHUTOFF VALVE Purpose The EDP supply shutoff valve stops hydraulic fluid supply from the reservoir to the EDP when the engine fire switch is in the up position. Physical Description The supply shutoff valve is a two-position valve.
Page 37 777 TRAINING MANUAL ENG BTL ENG BTL 1 DISCH 2 DISCH DISCH DISCH ENGINE FIRE SWITCHES (P8) FROM HYDRAULIC RESERVOIR EDP SUPPLY S/O VALVE POSITION INDICATOR DEPRESS VALVE EDP SUPPLY SHUTOFF VALVE CASE DRAIN ENGINE AFT STRUT FAIRING PRESS MAIN HYDRAULIC SYSTEMS - ENGINE DRIVEN PUMP - SUPPLY SHUTOFF VALVE 29-10-00 - 25 - ALTEON PROPRIETARY.
Page 38 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ALTERNATING CURRENT MOTOR PUMP Purpose Training Information Point The ACMPs are the primary pumps in the center hydraulic The center system ACMPs attach to airplane structure system and the demand pumps in the left and right through four vibration isolators.
Page 39 777 TRAINING MANUAL ACMP C2 ACMP C1 ACMP INBD RIGHT WHEEL WELL VIBRATION ISOLATORS ENGINE STRUT CENTER SYSTEM ACMP MAIN HYDRAULIC SYSTEMS - ALTERNATING CURRENT MOTOR PUMP 29-10-00 - 27 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 40 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - INTRODUCTION Purpose turbine housing for ADP assembly C2 to permit the exhaust ducts to be near each other. Two air driven pump (ADP) pumps are the demand pumps for the center hydraulic system. Two ADP logic speed control units (LSCU), one for each ADP assembly, control the pump operation.
Page 41 777 TRAINING MANUAL EXHAUST VENTS MSOV INLET DUCT ACCESS DOOR PUMP C2 LSCU EXHAUST DUCTS INLET PUMP C1 DUCT MSOV LSCU INBD LOGIC SPEED CONTROL UNIT MAIN HYDRAULIC SYSTEMS - ADP ASSEMBLY - INTRODUCTION 29-10-00 - 29 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 42 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - AIR DRIVE UNIT THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 30 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 43: Training Manual
777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - AIR DRIVE UNIT General Turbine Gearbox Assembly Each ADU has these components: Pneumatic power goes through the MSOV to the TGA. Modulating shutoff valve (MSOV) The turbine in the TGA turns the gearbox. The gearbox Turbine gearbox assembly (TGA) has a planetary gearset to decrease turbine speed to ADU heater (not shown).
Page 44 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - AIR DRIVE UNIT Turbine Gearbox Assembly Servicing There is an oil sight glass and fill plug on the front of the turbine gearbox assembly (TGA). Look at the sight glass on the outboard side of the TGA on each air-driven pump (ADP) assembly.
Page 45: Oil Filter
777 TRAINING MANUAL INLET V-BAND ISOLATOR CLAMP MSOV ADP ASSY POSITION INDICATOR V-BAND CLAMP ADP ASSY INLET DUCT VIGV EXHAUST PNEUMATIC DUCT ACTUATOR MSOV MSOV PNEUMATIC TURBINE ACTUATOR GEARBOX ASSEMBLY MODULATING SHUTOFF VALVE FILTER PUMP V-BAND CLAMPS INLET ISOLATOR FILL MODULATING PLUG SHUTOFF...
Page 46 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 34 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 47 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - FUNCTIONAL DESCRIPTION General Normal Operation The ADP assembly gets pressurized air from the airplane The signal to operate the ADP assembly comes from the pneumatic system. HYDIM cards when the selector is in the AUTO position or from the ADP selector when the selector is in the ON Air flows through the modulating shutoff valve (MSOV) position.
Page 48 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP ASSEMBLY - FUNCTIONAL DESCRIPTION the TGA sends a pulsed pneumatic signal in proportion operate and the butterfly valve in the MSOV fully to turbine speed. This signal goes to the secondary opens. speed control fluidic circuit.
Page 49: Air Inlet
777 TRAINING MANUAL AUTO AUTO HYDIM CARD L AND R SYSTEMS ARINC 629 BUSES ADP SELECTOR LSCU PRIMARY OVERSPEED SPEED PROTECTION CONTROL OVERSPEED LATCH MSOV ELECTRO-PNEUMATIC SERVOVALVE AUTO RUN PNEUMATIC COIL SECONDARY LVDT ACTUATOR SPEED CONTINUOUS CONTROL RUN COIL FLUIDIC PRI RSV CIRCUIT SOL VLV...
Page 50 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADU HEATERS Purpose The AIMS shows the status message HYD PUMP DEM C1 or HYD PUMP DEM C2 if there is a failure in an ADU heater The air drive unit (ADU) heaters give heat to the speed element.
Page 51 777 TRAINING MANUAL HEATER FOR MSOV PNEUMATIC ACTUATOR DUCT (CONFORMAL HEATER) HEATER FOR VIGV SERVO VALVE (CARTRIDGE HEATER) HEATER FOR SECONDARY SPEED CONTROL ASSEMBLY (CARTRIDGE HEATER) HEATER FOR MSOV SOLENOID (CONFORMAL HEATER) ADP ASSEMBLY - LOOKING FORWARD MAIN HYDRAULIC SYSTEMS - ADU HEATERS 29-10-00 - 39 - ALTEON PROPRIETARY.
Page 52 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADU HEATERS - FUNCTIONAL DESCRIPTION General 30 minutes after the total air temperature goes above 2C The air drive unit (ADU) heaters operate automatically Both ADP case drain temperatures are more than to keep the temperature of the ADU speed control 10C.
Page 53 777 TRAINING MANUAL HEATERS ON - TAT < 2C - ADP C1 TEMP < 10C - ADP C2 TEMP < 10C HYDIM CR CARDS CARDS - ADP C1 OPNL TEST - ADP C2 OPNL TEST - ADP & RAT HTRS OPERATIONAL TEST HYDIM CL TO HYDIM CR...
Page 54 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- AC MOTOR PUMP (ACMP) PRESSURE AND CASE DRAIN FILTER MODULE Purpose the aft strut fairing doors on the right side of each engine strut. The ACMP pressure and case drain filter module removes particles from the hydraulic fluid after the fluid The filter modules for the two center system ACMPs are leaves the ACMP.
Page 55 777 TRAINING MANUAL LEFT OR RIGHT SYSTEM ACMP FILTER MODULE CENTER SYSTEM ACMP PRESSURE CASE DRAIN FILTER MODULES PRESS ENGINE STRUT RIGHT WHEEL WELL TEMPERATURE TRANSDUCER PRESSURE PRESSURE TRANSDUCER TRANSDUCER PRESSURE TEMPERATURE TRANSDUCER TRANSDUCER PRESS TEMPERATURE TRANSDUCER DIFFERENTIAL PRESSURE CASE DRAIN INDICATOR CASE DRAIN FILTER...
Page 56 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP AND EDP PRESSURE AND CASE DRAIN FILTER MODULES THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 44 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 57 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP AND EDP PRESSURE AND CASE DRAIN FILTER MODULES Purpose Location The pressure and case drain filter modules for the EDPs The filter module for the left system EDP is in the and the ADPs remove the particles from the hydraulic left engine aft strut fairing.
Page 58 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- ADP AND EDP PRESSURE AND CASE DRAIN FILTER MODULES Training Information Point You can not clean the filters and use them again. The red differential pressure indicator extends to show a clogged filter. Replace the filter and manually reset the indicator.
Page 59 777 TRAINING MANUAL ADP C2 LEFT MAIN FILTER MODULE GEAR WHEEL WELL EDP FILTER MODULE ADP C1 FILTER MODULE ADP FILTER MODULES PRESS ENGINE STRUT DIFFERENTIAL PRESSURE INDICATORS TEMP XDCR PRESSURE PRESS TRANSDUCER XDCR GROUND SERVICE DISCONNECT TEMPERATURE (NOT ON ADP TRANSDUCER C1 FILTER MODULE)
Page 60 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- RETURN FILTER MODULES THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 48 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 61: Training Manual
777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- RETURN FILTER MODULES Purpose The center system return filter module is on the keelbeam in the right wheel well. The return filter modules remove particles from the hydraulic fluid before the fluid returns to the Functional Description reservoirs.
Page 62 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- RETURN FILTER MODULES A red indicator on the bypass relief valve extends to show the bypass valve is open. You use the ground service disconnect as the return port during ground hydraulic pressure cart operation. The center system ground service disconnect is not on the return filter module.
Page 63 777 TRAINING MANUAL BYPASS RELIEF CASE VALVE WITH DRAIN INDICATOR GROUND SERVICE CENTER SYSTEM RETURN FILTER DISC MODULE TO CENTER SYSTEM RESERVOIR FROM RETURN DIFFERENTIAL MANIFOLD PRESSURE INDICATOR CENTER SYSTEM RETURN CENTER SYSTEM RETURN FILTER MODULE FILTER MODULE RIGHT MAIN GEAR WHEEL WELL RETURN FILTER MODULE BYPASS RELIEF...
Page 64 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HEAT EXCHANGERS Purpose is necessary to cool the case drain flow from the left and right hydraulic systems. A heat exchanger in each hydraulic system cools the case drain hydraulic fluid from the EDPs and the ACMPs. Approximately 1080 gallons (4095 liters) (7303 pounds) This extends the service life of the fluid and the (3313 kg) of fuel in the right main tank is necessary...
Page 65 777 TRAINING MANUAL RIGHT SYSTEM HEAT CENTER SYSTEM EXCHANGER HEAT EXCHANGER LEFT CENTER SYSTEM HEAT SYSTEM HEAT EXCHANGER RIGHT SYSTEM EXCHANGER HEAT EXCHANGER INBD RIGHT MAIN FUEL TANK LEFT SYSTEM HEAT EXCHANGER INBD HEAT EXCHANGER (TYPICAL) LEFT MAIN FUEL TANK MAIN HYDRAULIC SYSTEMS - HEAT EXCHANGERS 29-10-00 - 53 -...
Page 66 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- RESERVE ISOLATION VALVE AND NOSE GEAR ISOLATION VALVE General Location The reserve isolation valve and the nose gear isolation Both valves are in the right wheel well on the valve supply engine burst protection to the center keelbeam.
Page 67 777 TRAINING MANUAL NOSE GEAR ISOLATION VALVE RESERVE ISOLATION VALVE INBD RIGHT MAIN GEAR WHEEL WELL POSITION INDICATION ACMP LEVER TO C SYS RETURN TO OTHER CENTER HYD SYSTEM USERS RSV ISLN ACTUA- TION NG ISLN NOSE ALTN GEAR BRAKES STEERING ISOLATION VALVE (TYPICAL) MAIN HYDRAULIC SYSTEMS - RESERVE ISOLATION VALVE AND NOSE GEAR ISOLATION VALVE...
Page 68 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER SYSTEM RETURN MANIFOLD AND PRESSURE RELIEF VALVE Return Manifold The center system return manifold collects the return hydraulic flows from center hydraulic system components. The manifold is on the ceiling in the right wheel well near the keelbeam.
Page 69 777 TRAINING MANUAL CENTER SYSTEM RETURN MANIFOLD PRESSURE RIGHT MAIN GEAR WHEEL WELL RELIEF VALVE PRESSURE ACMP RELIEF VALVE TO C SYS RETURN RSV ISLN ACTUA- TION NG ISLN NOSE ALTN GEAR BRAKES STEERING MAIN HYDRAULIC SYSTEMS - CENTER SYSTEM RETURN MANIFOLD AND PRESSURE RELIEF VALVE 29-10-00 - 57 - ALTEON PROPRIETARY.
Page 70 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC ACCUMULATORS THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 58 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 71 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC ACCUMULATORS Purpose valve for the accumulators in each system lets you connect a nitrogen supply. Hydraulic accumulators absorb pressure changes caused by tail flight control PCU operation. This increases WARNING: YOU MUST PREVENT ALL POSSIBLE OPERATION OF THE the life of the hydraulic system components.
Page 72 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC ACCUMULATORS WARNING: DO NOT RELEASE NITROGEN INTO THE COMPARTMENT WHEN DISCONNECTING THE CHARGING ASSEMBLY FROM THE HYDRAULIC ACCUMULATORS. NITROGEN WILL DISPLACE AIR AND REDUCE THE OXYGEN LEVEL IN THE COMPARTMENT. A LACK OF OXYGEN CAN RESULT IN UNCONSCIOUSNESS OR DEATH.
Page 73 777 TRAINING MANUAL RIGHT SYSTEM HYDRAULIC ACCUMULATOR CENTER SYSTEM HYDRAULIC ACCUMULATOR LEFT SYSTEM HYDRAULIC ACCUMULATOR STABILIZER COMPARTMENT HYDRAULIC ACCUMULATORS LEFT SYSTEM ACCUMULATORS (3) PRESSURE GAGE (3) CHARGING CHART CENTER SYSTEM RIGHT SYSTEM CHARGING VALVE (3) L OUTBD ELEV PCU R OUTBD L INBD R INBD ELEV PCU...
Page 74 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - ENGINE DRIVEN PUMP General solenoid valve to remove pressure from the EDP. There is no case drain flow in this condition. The EDPs operate when the related engine turns. The supply shutoff valve moves to the OPEN position The EDPs can be depressurized by the EDP switch or by when you move the engine fire switch to the stowed the engine fire switch.
Page 75 777 TRAINING MANUAL 28V DC OPEN NORMAL CAPT FLT INST BUS HYD ENG PUMP SUPPLY SHUTOFF VALVE TO HYDIM CARDS CLOSE 28V DC FIRE L OR R EDP SUPPLY MAIN BUS S/O VLV ENGINE FIRE HYD ENG PUMP CONTROL FROM HYDRAULIC RESERVOIR POWER MGMT PANEL EDP SUPPLY...
Page 76 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - AIR DRIVEN PUMP THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 64 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 77 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - AIR DRIVEN PUMP General get a hardwire electrical signal from the AUTO position of the ADP selector. The pneumatic system supplies the pressurized air to operate the air driven pumps. The HYDIM cards prevent or stop demand mode ADP operation during main engine start on the ground.
Page 78 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - AIR DRIVEN PUMP Both ADPs operate for these conditions: Training Information Point Autoslat operation The ADP C1 selector must be in the OFF or AUTO position Landing gear retraction for ADP C2 to run continuously. If both ADP selectors Takeoff roll (ground mode, airspeed is more than are in the ON positions, only ADP C1 will operate.
Page 79 777 TRAINING MANUAL 28V DC BAT. BUS LOGIC/ HYD AIR SPEED PUMP C1 HYDIM CR CONTROL HYDIM CL UNIT P310 STBY PWR SINGLE PUMP OPERATION MGMT PANEL LANDING GEAR EXTENSION FLAP OR SLAT OPERATION 28V DC BAT. BUS LOW CTR SYS PRESS OR LOW MSOV HYD AIR CTR SYS ACMP PRESSURES...
Page 80 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - ALTERNATING CURRENT MOTOR PUMP THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 68 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 81 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - ALTERNATING CURRENT MOTOR PUMP General When the left demand pump selector is in AUTO, the left HYDIM card operates the left ACMP for any of these The controls on the hydraulic control panel send pump conditions: control signals to the overhead panel ARINC 629 system (OPAS).
Page 82 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- FUNCTIONAL DESCRIPTION - ALTERNATING CURRENT MOTOR PUMP get the signal. If the selector is in AUTO or ON or if the switch is in ON, the ELCU gets the signal. It energizes a relay to supply electrical power to the ACMP.
Page 83 777 TRAINING MANUAL RAM AIR TURBINE PRESS 115V AC R LEFT UNLKD MAIN BUS ACMP HYDRAULIC 28V DC R AUTO ELEC MAIN BUS SPLY L ENG R ENG L ELEC FAULT FAULT OPAS HYD PUMP L DEM PUMP FAULT FAULT SELECTOR L ELEC R ELEC...
Page 84 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- LEFT AND RIGHT SYSTEMS - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 72 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 85 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- LEFT AND RIGHT SYSTEMS - FUNCTIONAL DESCRIPTION General The ACMPs are the demand pumps for the left and right hydraulic systems. The ACMPs normally operate only when The left and right hydraulic systems are functionally there is high hydraulic system demand.
Page 86 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- LEFT AND RIGHT SYSTEMS - FUNCTIONAL DESCRIPTION filter module measures pump case drain fluid temperature. The ACMPs have a temperature switch that sets when the pump temperature is too high. The temperature at which it sets is the same as the overheat set point from the temperature transducer on the filter module.
Page 87 777 TRAINING MANUAL PRESS AIR RSVR PRESS SUPPLY RSVR PRESS SW RELIEF RSVR VALVE RETURN RSVR PRESS MODULE PRESS RSVR TEMP PRESSURE VALVE XDCR EDP SUPPLY S/O VALVE SAMPLE VALVE DRAIN VALVE DEPRESS SOLENOID VALVE ACMP TEMP SWITCH TEMP XDCR TEMP XDCR RETURN FILTER MODULE...
Page 88 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER SYSTEM - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 76 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 89 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER SYSTEM - FUNCTIONAL DESCRIPTION General Pressurization The center hydraulic system supplies pressurized The ACMPs are the primary pumps in the center hydraulic hydraulic fluid to operate these systems: system. They are normally on. Nose landing gear actuation The ADPs are the demand pumps in the center system.
Page 90 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER SYSTEM - FUNCTIONAL DESCRIPTION The ACMP and ADP filter modules each have a pressure transducer to measure pump output pressure. A temperature transducer in each filter module measures pump case drain temperature. The ACMPs have a temperature switch that sets when the pump temperature is too high.
Page 91 777 TRAINING MANUAL RSVR PRESS SWITCH RETURN FILTER MOD CENTER SYS RTN SAMPLE LG ALTN VALVE SYSTEM GND SVC DISC RTN DRAIN VALVE ACMP ACMP TEMP TEMP SWITCH SWITCH FROM RSVR SERVICING STATION FILTER FILTER FILTER FILTER CHECK- MODULE PRESS SUPPLY RSV ISLN GND SVC...
Page 92 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER HYDRAULIC ISOLATION SYSTEM - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-10-00 - 80 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 93 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER HYDRAULIC ISOLATION SYSTEM - FUNCTIONAL DESCRIPTION General control valve (PCV) for this condition. This prevents hydraulic operation of the slats. The center hydraulic isolation system (CHIS) supplies engine burst protection and a reserve brakes and When CHIS is active, this divides the center hydraulic steering function.
Page 94 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- CENTER HYDRAULIC ISOLATION SYSTEM - FUNCTIONAL DESCRIPTION Nose Gear Isolation Valve CHIS Reset The HYDIM CL reopens the nose gear isolation valve for Both valves open again automatically when the center any of these conditions: system quantity is more than 0.70 and airspeed is less than 60 knots for five seconds.
Page 95 777 TRAINING MANUAL CTR HYD SYS RSVR RSV AND NG ISLN VALVES CLOSE Ñ AIRSPEED > 60 KTS AND C SYS QTY < 0.4 (1 SECOND DELAY) ACMP C1 ACMP C2 ADP C1 ADP C2 NOSE GEAR ISLN VALVE OPEN Ñ...
Page 96 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- INTRODUCTION General changes, and the twisting moment of the counterweight assembly changes. When this occurs, the turbine blades The ram air turbine (RAT) supplies an emergency source change to a new force balance position. The governing of hydraulic power to operate the flight controls.
Page 97 777 TRAINING MANUAL INBD RIGHT WHEEL WELL ACTUATOR CHECKOUT MODULE COMPARTMENT DOOR DOOR ACTUATION LINK ASSEMBLY RAT COMPARTMENT RIGHT WHEEL WELL - AFT BULKHEAD RAM AIR TURBINE SYSTEM - INTRODUCTION 29-20-00 - 85 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 98 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- GENERAL DESCRIPTION General Indications The HYDIM cards or the ELMS control the automatic The AIMS gets RAT position and pressure data for flight operation of the RAT. deck indication and fault detection. The RAT manual switch permits manual RAT extension.
Page 99 777 TRAINING MANUAL WOW CARD ADIRU RIGHT PRESS UNLKD HYDIM CR FLT CONTROLS RAT MANUAL SW ARINC 629 (AUTO-DEPLOY) BUSES AIMS HYDIM R RIGHT CARD FILE EDIU LEFT HYDIM L EDIU RIGHT HYDIM CL (AUTO-DEPLOY P310 STANDBY AND GEN HTR) PWR MANAGEMENT PANEL ELMS...
Page 100 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT ASSEMBLY THIS PAGE INTENTIONALLY LEFT BLANK 29-20-00 - 88 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 101 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT ASSEMBLY General RAT Hydraulic Pump These components are part of the RAT assembly: The RAT hydraulic pump is a two-stage pressure- compensated pump. It attaches to the aft face of the RAT governor-generator assembly governor-generator assembly.
Page 102 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT ASSEMBLY It opens when the RAT is 15 degrees from the extended position to change retraction control to the RAT blade locked switch. 29-20-00 - 90 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 103 777 TRAINING MANUAL ACTUATOR (REF) STRUT RAT STRUT RAT GOVERNOR- ANGLE SWITCH GENERATOR ASSEMBLY RAT BLADE LOCK PIN TELEFLEX CABLE TURBINE SWITCH COVER RAT BLADE SWITCH LOCKED SW TELEFLEX ACTUATOR CABLE RAT BLADE LOCK PIN HYDRAULIC PUMP STRUT TURBINE GENERATOR TURBINE BLADES RAT STRUT...
Page 104 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT ACTUATOR AND STOWED SWITCH Purpose This unlocks the actuator and the internal spring extends the RAT. The RAT actuator extends and retracts the ram air turbine assembly. To retract the RAT, center system hydraulic pressure goes to the retract side of the RAT actuator.
Page 105 777 TRAINING MANUAL RAT STOWED SWITCH SOLENOIDS RAM AIR TURBINE RAT ACTUATOR RAM AIR TURBINE SYSTEM - RAT ACTUATOR AND STOWED SWITCH 29-20-00 - 93 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 106 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - INTRODUCTION Purpose The RAT checkout module components visible from outside the module (some of which are LRUs) are these: The RAT checkout module controls the flow of hydraulic fluid to and from the RAT pump during RAT operation and Pressure transducer (LRU) during ground operational tests.
Page 107 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - INTRODUCTION actuator. The valve permits the RAT to fully retract actuator to the center hydraulic system return to only when the turbine blades are locked. permit extension. RAT Stow Valve The RAT stow valve has a switch that monitors the position of the valve.
Page 108 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - INTRODUCTION Training Information Point The RAT extension time is approximately two seconds. The RAT retraction time is approximately 45 seconds. It is necessary to install a protection cage around the RAT when you do the backdrive operational test of the RAT.
Page 109 777 TRAINING MANUAL RAT PRESS TRANSDUCER C HYD SYS INBD SUPPLY RAT PUMP SUPPLY RAT PUMP PRESSURE RAT PUMP CASE DRAIN START-UP QUANTITY BYPASS FUSE C HYD PRESS RIGHT MLG WHEEL WELL ELECTRICAL C HYD SYS CONNECTOR RETURN RAT STOW CASE DRAIN VALVE FILTER...
Page 110 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - PHYSICAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-20-00 - 98 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 111 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - PHYSICAL DESCRIPTION General to the center hydraulic system return to permit extension. The RAT checkout module has these components (some of which are LRUs): RAT Stow Valve Position Switch RAT stow valve The RAT stow valve position switch actuates when the RAT stow valve position switch...
Page 112 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT CHECKOUT MODULE - PHYSICAL DESCRIPTION In the FLIGHT position, the valve lets RAT pump Thermal Bleed Orifice pressure go to the center hydraulic system. In the MOTOR position, the valve permits center hydraulic The thermal bleed orifice lets approximately 0.3 gpm of system pressure to backdrive the RAT during ground hydraulic fluid through the RAT pump when the center...
Page 113 777 TRAINING MANUAL PRESSURE START-UP QTY TRANSDUCER BYPASS FUSE TO HYDIM CARDS RAT STOW FLIGHT VALVE POS PRESSURE RELIEF SWITCH VALVE FLIGHT MOTORING VALVE STOW TO RAT VALVE HYD PUMP VALVE CHECK VALVES TO RAT ACTUATOR THERMAL BLEED ORIFICE RAT CHECKOUT CHECK MODULE FROM CENTER...
Page 114 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- EXTENSION - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 29-20-00 - 102 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 115 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- EXTENSION - FUNCTIONAL DESCRIPTION General Both engines are below idle rpm and center hydraulic system pressure is low or (L,C, and R A switch on the P5 overhead panel permits manual RAT hydraulic system pressures are low).
Page 116 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- EXTENSION - FUNCTIONAL DESCRIPTION Indication The RAT stowed switch in the RAT compartment sends a not-stowed signal to HYDIM CL when the RAT is not in the stowed position. HYDIM CL turns on the RAT switch UNLKD light and sends a signal to the AIMS to show the RAT UNLOCKED advisory message.
Page 117 777 TRAINING MANUAL NORMAL 28V DC APU BAT. BUS RAT AUTO/ MANUAL CONTROL P49 APU PANEL RAT ACTR SOLENOID 28V DC HOT BAT. BUS RAT ACTR DEPLOY SOLENOID STOWED RAT AUTO/ OPAS RAT MANUAL MANUAL SWITCH (P5) CONTROL P310 STANDBY POWER MGMT STOWED ELMS PANEL...
Page 118 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- FUNCTIONAL DESCRIPTION - IN-FLIGHT OPERATION Hydraulic Operation control wheel rotation are necessary to hold the wings level. After in-flight extension, the RAT turbine turns. The start-up quantity bypass fuse lets the initial RAT output go to return.
Page 119 777 TRAINING MANUAL AIMS HYDIM CL PRESS UNLKD PRESSURE RAT STOW FLIGHT TRANSDUCER VLV POS RAT MANUAL START-UP QTY SWITCH SWITCH (P5) BYPASS FUSE CASE DRAIN PRESS MOTORING VALVE PUMP SUPPLY ACTUATOR RAT STOW THERMAL VALVE PRESSURE BLEED ORIFICE SUPPLY RETURN RAM AIR TURBINE SYSTEM - FUNCTIONAL DESCRIPTION - IN-FLIGHT OPERATION 29-20-00...
Page 120 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- FUNCTIONAL DESCRIPTION - MOTORING General pressure indication stays on until internal leakage in the RAT module causes the pressure to decrease. A functional test of the RAT may be done with the RAT checkout module.
Page 121 777 TRAINING MANUAL AIMS HYDIM CL PRESS UNLKD RAT STOW FLIGHT VLV POS RAT MANUAL RAT MOTORING SWITCH SWITCH (P5) VALVE LEVER MOTORING VALVE PUMP ACTUATOR RAT STOW VALVE PRESSURE SUPPLY RETURN RAT CHECKOUT MODULE RAM AIR TURBINE SYSTEM - FUNCTIONAL DESCRIPTION - MOTORING 29-20-00 - 109 - ALTEON PROPRIETARY.
Page 122 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- FUNCTIONAL DESCRIPTION - RETRACTION THIS PAGE INTENTIONALLY LEFT BLANK 29-20-00 - 110 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 123 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- FUNCTIONAL DESCRIPTION - RETRACTION General The RAT stow valve position switch supplies the ground for the RAT module solenoid valve when the stow valve You use the stow lever on the RAT checkout module to is in the STOW position.
Page 124 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- FUNCTIONAL DESCRIPTION - RETRACTION If you release the RAT stow lever during retraction, the lever moves to the STOP position and the RAT retraction stops. RAT retraction time is approximately 45 seconds. HYDIM CL monitors the position of the RAT stow valve through the RAT stow valve position switch.
Page 125 777 TRAINING MANUAL LOCKED UNLOCKED 28V DC RAT BLADE <15 CAPT FLT LOCKED SW INST RAT AUTO >15 CONTROL RAT STRUT ANGLE SW FLIGHT RAT STOW VLV POS HYDIM CL SWITCH RAT STOW MOTORING LEVER VALVE PUMP ACTUATOR RAT STOW RAT MDL VALVE PRESSURE SOL VLV...
Page 126 777 TRAINING MANUAL RAM AIR TURBINE SYSTEM -- RAT GENERATOR HEATER SYSTEM General The ON signal goes to the ELMS control and communications unit (CCU) in the P210 power management The heater system for the RAT generator operates panel. The SIU energizes relays to supply power to the automatically.
Page 127 777 TRAINING MANUAL HEATERS ON - TAT < 2C - ADP C1 TEMP < 10C ARINC 429 - ADP C2 TEMP < 10C HYDIM CL CARDS CARDS - ADP C1 OPNL TEST - ADP C2 OPNL TEST - ADP & RAT HTRS OPERATIONAL TEST HYDIM CL P85 LEFT SYSTEMS...
Page 128 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- INTRODUCTION General The hydraulic indicating system monitors these values: Fluid and reservoir pressures Fluid temperature Fluid quantity. The indicating systems get inputs from these sensors: Hydraulic pump pressure transducer (8) Hydraulic system pressure transducer (3) Hydraulic reservoir pressure switch (3) Hydraulic pump temperature transducer (8) Hydraulic pump temperature switch (4)
Page 129 777 TRAINING MANUAL SYSTEM PRESSURE TRANSDUCER (3) PUMP PRESSURE PRESSURE INDICATING TRANSDUCER (8) RESERVOIR PRESSURE SWITCH (3) HYDIM CARD (4) AIMS PUMP TEMPERATURE SWITCH (4) FLUID TEMPERATURE PUMP TEMPERATURE INDICATING TRANSDUCER (8) RESERVOIR TEMPERATURE LEFT AND RIGHT SYSTEM TRANSDUCER (3) CARD FILE (2) FLUID QUANTITY RESERVOIR QUANTITY...
Page 130 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- PUMP AND RESERVOIR SENSORS - COMPONENT LOCATIONS Pump Sensors Training Information Point Each pump has two transducers: All the pump temperature transducers are interchangeable. One pressure transducer One temperature transducer. The pump pressure transducers are interchangeable with each other and are also interchangeable with the system These transducers are on or near the ACMP, ADP, and EDP pressure transducers.
Page 131 777 TRAINING MANUAL RSVR PRESS PRESS SWITCH XDCR TEMP TEMP XDCR XDCR QUANTITY TRANSMITTER ACMP FILTER MODULE ENGINE STRUT - RIGHT SIDE LEFT/RIGHT HYD SYS RSVR (CENTER SYSTEM) RESERVOIR PRESSURIZATION MODULE (REF) C SYSTEM RSVR RSVR PRESS PRESS SW XDCR TEMP XDCR TEMP...
Page 132 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- HYDRAULIC SYSTEM PRESSURE TRANSDUCER - COMPONENT LOCATIONS General The left and right hydraulic system pressure transducers are on the rear wing spar of the left and right wings. The center system pressure transducer is near the keelbeam in the right wheel well.
Page 133 777 TRAINING MANUAL PRESSURE TRANSDUCER RIGHT SYSTEM REAR PRESSURE WING SPAR TRANSDUCER LEFT SYSTEM PRESSURE TRANSDUCER PRESSURE TRANSDUCER INBD CENTER SYSTEM PRESSURE TRANSDUCER RIGHT WHEEL WELL HYDRAULIC INDICATING SYSTEM - HYDRAULIC SYSTEM PRESSURE TRANSDUCER - COMPONENT LOCATIONS 29-30-00 - 121 - ALTEON PROPRIETARY.
Page 134 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- PRESSURE INDICATING THIS PAGE INTENTIONALLY LEFT BLANK 29-30-00 - 122 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 135 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- PRESSURE INDICATING General HYD PRESS SYS L HYD PRESS SYS C These sensors in the hydraulic systems send hydraulic HYD PRESS SYS R pressure data to the HYDIM cards: HYD PRESS SYS L+C HYD PRESS SYS R+C System pressure transducer (3) HYD PRESS SYS L+R...
Page 136 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- PRESSURE INDICATING These status messages show if there is a signal for a These status messages show if the hydraulic reservoir pump to operate and the pump pressure is less than 1200 pressure is low: psi for ACMPs or 1800 psi for ADPs and EDPs: HYD RSVR PRESS L HYD PUMP PRI L...
Page 137 777 TRAINING MANUAL CAUTION MSG HYD PRESS SYS L L SYS PRESS XDCR HYDRAULIC/ HYD PRESS SYS C RAT PANEL C SYS PRESS XDCR HYD PRESS SYS R SYS PRESS < 1200 PSI HYD PRESS SYS L+C R SYS PRESS XDCR HYD PRESS SYS R+C HYD PRESS SYS L+R HYD PRESS SYS L+C+R...
Page 138 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- TEMPERATURE INDICATING THIS PAGE INTENTIONALLY LEFT BLANK 29-30-00 - 126 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 139 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- TEMPERATURE INDICATING General HYD OVERHEAT PRI R HYD OVERHEAT DEM L Temperature transducers for each hydraulic reservoir HYD OVERHEAT DEM C1 and each hydraulic pump send temperature data to the HYD OVERHEAT DEM C2 HYDIM cards.
Page 140 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- TEMPERATURE INDICATING Hydraulic Reservoir Temperature Indication Reservoir temperature in degrees C shows on the hydraulic maintenance page. There are no reservoir overheat indications. Training Information Point CAUTION: DO NOT OPERATE THE HYDRAULIC PUMPS AFTER THE TEMPERATURE INDICATION ON EICAS IS MORE THAN 100C (212F) OR AFTER THE PUMP FAULT LIGHT COMES ON.
Page 141 777 TRAINING MANUAL ADVISORY MSG L SYS EDP TEMP XDCR HYD OVERHEAT PRI L C1 ACMP TEMP XDCR/SW HYD OVERHEAT PRI C1 HYD OVERHEAT PRI C2 C2 ACMP TEMP XDCR/SW TEMP > 105C HYD OVERHEAT PRI R HYDRAULIC/RAT R SYS EDP TEMP XDCR HYD OVERHEAT DEM L TEMP <...
Page 142 777 TRAINING MANUAL HYDRAULIC INDICATING SYSTEM -- FLUID QUANTITY INDICATING General hydraulic maintenance page. The OF shows only when the airplane is on the ground. A quantity transmitter in each of the hydraulic reservoirs measures fluid quantity. Reservoir quantity If reservoir quantity is 0.75 or less, an RF (refill) data goes to the HYDIM cards.
Page 143 777 TRAINING MANUAL GREEN BAND RESERVOIR QUANTITY TRANSMITTER RESERVOIR QUANTITY GAGE HYDRAULIC RESERVOIR (TYPICAL) QTY > 1.20 QTY < 0.75 R SYS RSVR QTY XMTR AIMS C SYS RSVR QTY XMTR QTY < 0.40 ADVISORY MSG RESET HYD QTY LOW L QTY >...
Page 144 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- TRAINING INFORMATION POINTS - GROUND SERVICING SYSTEM THIS PAGE INTENTIONALLY LEFT BLANK 29-18-00 - 132 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 145 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- TRAINING INFORMATION POINTS - GROUND SERVICING SYSTEM General The pressure fill connection permits the connection of a ground service cart to fill the hydraulic systems. A A central fill station in the ground service bay cap covers the connection when not in use.
Page 146 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- TRAINING INFORMATION POINTS - GROUND SERVICING SYSTEM WATER. IF YOU GET THE HYDRAULIC FLUID IN YOUR EYES, FLUSH YOUR EYES WITH WATER AND GET MEDICAL AID. IF YOU GET THE HYDRAULIC FLUID IN YOUR MOUTH, GET MEDICAL AID.
Page 147 777 TRAINING MANUAL PUMP HANDLE INSTRUCTION PLACARD SUCTION HOSE RESERVOIR FILL SELECTOR VALVE RESERVOIR FILL QUANTITY GAGE RESERVOIR FILL FILTER PRESSURE FILL CONNECTION RESERVOIR FILL MANUAL PUMP HYDRAULIC GROUND SERVICE BAY RESERVOIR FILL MANUAL PUMP RESERVOIR FILL FILTER PRESSURE FILL CONNECTION TO HYDRAULIC RESERVOIRS...
Page 148 777 TRAINING MANUAL HYDRAULIC POWER -- OPERATION THIS PAGE INTENTIONALLY LEFT BLANK 29-00-00 - 136 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 149 777 TRAINING MANUAL HYDRAULIC POWER -- OPERATION General the main fuel tanks to cool the heat exchangers. Approximately 709 gallons (2688 liters) (4794 pounds) You can pressurize the hydraulic systems with a ground (2175 kg) of fuel in the left and right main fuel tanks service cart or with the hydraulic pumps.
Page 150 777 TRAINING MANUAL HYDRAULIC POWER -- OPERATION The right and center system depressurized Only the right system pressurized No hydraulic system pressurized the fluid can move to the right system. To keep the movement of fluid between the right and center hydraulic systems to a minimum, do these steps: Pressurize the right hydraulic system first Remove the pressure from the right hydraulic...
Page 151 777 TRAINING MANUAL GND SVC DISC PRESSURE GND SVC DISC RETURN RAM AIR TURBINE PRESS UNLKD GND SVC DISC PRESSURE HYDRAULIC ELEC L ENG R ENG FAULT FAULT GND SVC DISC FAULT FAULT RETURN L ELEC R ELEC AUTO AUTO AUTO AUTO FAULT...
Page 152 777 TRAINING MANUAL HYDRAULIC POWER -- INDICATIONS General The synoptic display also shows these non-normal conditions: Hydraulic system data shows on these displays: Pump failure (amber symbol) Status display Valve failure (amber symbol) Hydraulic synoptic display Pump overheat condition (amber OVHT). Hydraulic maintenance page.
Page 153: Status Display
777 TRAINING MANUAL HYDRAULIC 1.20 0.72 0.39 2990 3010 3010 PRESS 100.1 OIL PRESS OIL TEMP OIL QTY STATUS DISPLAY HYDRAULIC _________ NORM BRKS FLAPS L REV R REV SYSTEM PRESS: 2990 3010 3010 NOSE GEAR ALTN/RSV MAIN GEAR & STEERING BRAKES &...
Page 154 777 TRAINING MANUAL HYDRAULIC POWER -- OPERATIONAL TESTS General Heaters Test These are the operational tests for the hydraulic The heaters test makes sure that the RAT heater and the system: ADP heaters operate normally. This test starts the heaters and then stops them again. Air driven pump (ADP) (C1) Air driven pump (ADP) (C2) Landing Gear Auto-Off Relay Tests...
Page 155 777 TRAINING MANUAL Select Operational Test GROUND TESTS 29 HYDRAULIC SYSTEM OPERATIONAL TESTS: Select ATA System (60) Select Test Type AIR DRIVEN PUMP (ADP) (C1) 27 Primary Flight Control System SYSTEM 27 Stall Warning Management TEST 27 High Lift System AIR DRIVEN PUMP (ADP) (C2) 29 Hydraulic System OPERATIONAL...
Page 156 777 TRAINING MANUAL HYDRAULIC POWER -- LRU REPLACEMENT TESTS General These are the LRU replacement tests for the hydraulic systems: HYDIM CL LRU replacement test HYDIM CR LRU replacement test HYDIM L LRU replacement test HYDIM R LRU replacement test. HYDIM LRU Replacement Tests A HYDIM LRU replacement test for each of the four HYDIM cards does a test of the HYDIM cards.
Page 157 777 TRAINING MANUAL Select LRU Replacement Test GROUND TESTS 29 HYDRAULIC SYSTEM LRU REPLACEMENT TESTS: Select ATA System (60) HYDIM (CL) Select Test Type 27 Primary Flight Control System SYSTEM HYDIM (CR) 27 Stall Warning Management TEST 27 High Lift System 29 Hydraulic System HYDIM (L) OPERATIONAL...
Page 158 777 TRAINING MANUAL MAIN HYDRAULIC SYSTEMS -- HYDRAULIC SYSTEM SUMMARY General center hydraulic system. A ram air turbine is an emergency source of hydraulic pressure for the center Three hydraulic systems independently supply hydraulic system primary flight controls. power to airplane systems. The center hydraulic system supplies these systems: Left Hydraulic System Flight controls...
Page 159 777 TRAINING MANUAL RSVR FILL SEL VLV HAND PUMP LEFT RIGHT SYSTEM SYSTEM CENTER SYSTEM RIGHT SYSTEM LEFT RETURN SYSTEM ALTN RETURN POWER CENTER PACK SYSTEM HEAT RETURN HEAT EXCHANGER HEAT EXCHANGER EXCHR RIGHT RIGHT LEFT LEFT ACMP ACMP ACMP ACMP CENTER RIGHT...
Page 160 777 TRAINING MANUAL LANDING GEAR -- INTRODUCTION General - indicator - left These are the landing gear systems (ATA 32): - landing - landing gear Landing gear, general - 32-00, 32-10, 32-20, 32-30 - lock Proximity sensor system (PSS) - 32-08 - lights Landing gear (LG) position indication and warning system - 32-61...
Page 161 777 TRAINING MANUAL LANDING GEAR - GENERAL PROXIMITY SENSOR TAIL STRIKE SYSTEM STEERING SYSTEM (PSS) LG POSITION INDICATING AIR/GROUND SYSTEM (AGS) WHEELS AND BRAKES AND WARNING SYSTEM LANDING GEAR - INTRODUCTION 32-00-00 - 149 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 162 777 TRAINING MANUAL LANDING GEAR -- GENERAL - INTRODUCTION Purpose Landing gear structural components hold the weight of the airplane while the airplane is on the ground. These are the landing gear structural systems: The main landing gear (MLG) and doors (ATA 32-10) The nose landing gear (NLG) and doors (ATA 32-20).
Page 163 777 TRAINING MANUAL LANDING GEAR - GENERAL LANDING GEAR STRUCTURES EXTENSION - RETRACTION MAIN LANDING GEAR AND DOORS LANDING GEAR CONTROL SYSTEM NOSE LANDING GEAR AND DOORS MLG EXTENSION - RETRACTION NLG EXTENSION - RETRACTION LG ALTERNATE EXTENSION SYSTEM LANDING GEAR - GENERAL - INTRODUCTION 32-00-00 - 151 - ALTEON PROPRIETARY.
Page 164 777 TRAINING MANUAL MAIN LANDING GEAR AND DOORS -- INTRODUCTION General Shock strut Forward and aft tow fittings The two main heavy duty semi-levered landing gear Forward and aft jack points (not shown). absorb landing forces. They hold most of the airplane weight when the airplane is on the ground.
Page 165 777 TRAINING MANUAL DOOR UPLOCK HOOK DRAG BRACE DOOR SIDE BRACE ASSEMBLY RETRACT ACTUATOR TRUNNION DOOR ACTUATOR TRUNNION DOOR DRAG BRACE BODY DOOR ASSEMBLY SHOCK STRUT DOOR TORSION LINKS DRAG BRACE LOCK LINKS SEMI-LEVERED HYDRAULIC STRUT INBD TOW FITTING MLG TRUCK ASSEMBLY LEFT MAIN LANDING GEAR AND DOORS MAIN LANDING GEAR AND DOORS - INTRODUCTION...
Page 166 777 TRAINING MANUAL MAIN LANDING GEAR AND DOORS -- SIDE BRACE ASSEMBLY, DRAG BRACE ASSEMBLY, AND LOCK LINKS General MLG Side Brace Assembly The MLG side brace assembly and the MLG drag brace The MLG side brace assembly is on the aft side of the assembly hold the main landing gear in the extended main landing gear.
Page 167 777 TRAINING MANUAL UPPER DRAG BRACE LOCK LINK MLG SHOCK LOWER STRUT SIDE BRACE DRAG BRACE UPPER SPINDLE LOCK LINK SIDE BRACE DRAG BRACE LOCK LINKS LOCK LINKS MLG DRAG BRACE LOCK LINKS (SIDE BRACE LOCK LINKS ALMOST THE SAME) UPPER DRAG BRACE DRAG BRACE...
Page 168 777 TRAINING MANUAL MAIN LANDING GEAR AND DOORS -- TRUCK ASSEMBLY General the main gear steering section for more information (ATA 32-53). Each main landing gear truck has these components: Axles Tow fittings Brake rods Wheels and tires Brakes Semi-Levered Gear (SLG) Actuator Main gear steering components.
Page 169 777 TRAINING MANUAL SEMI-LEVERED HYDRAULIC STRUT STEERING FWD TOW COMPONENTS FITTING (HIDDEN) AFT TOW FITTING WHEEL AND JACK POINT TIRE (6) BRAKE RODS (4) AXLE JACKPOINT INBD MAIN LANDING GEAR AND DOORS - TRUCK ASSEMBLY 32-10-00 - 157 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 170 777 TRAINING MANUAL MAIN LANDING GEAR AND DOORS -- SHOCK STRUT Purpose These permit change of faulty seals without removal of the inner cylinder. The main landing gear shock struts absorb landing forces and transmit vertical loads to the airplane Training Information Point structure.
Page 171 777 TRAINING MANUAL CHARGING VALVE SPARE SEAL (AFT SIDE) CARRIER SPARE DYNAMIC SEAL OUTER CYLINDER DYNAMIC SEAL OUTER CYLINDER OIL CHARGING VALVE BACKUP INNER RINGS FOR CYLINDER THE STATIC STATIC SEALS (QTY 4) SEAL SPARE TORSION DYNAMIC LINKS SEALS SPARE BACKUP STATIC RINGS FOR...
Page 172 777 TRAINING MANUAL MAIN LANDING GEAR AND DOORS -- MLG DOORS General MLG body door during alternate landing gear extension or if the truck does not move to a tilt down position These are the four main landing gear doors: during MLG retraction.
Page 173 777 TRAINING MANUAL MLG DOOR UPLOCK HOOK ASSEMBLY DOOR ACTUATOR MLG BODY DOOR MLG TRUNNION DOOR MLG SHOCK STRUT DOOR MLG DRAG BRACE DOOR SKID BARS (3) INBD UPLOCK ROLLER LEFT MAIN LANDING GEAR DOORS MAIN LANDING GEAR AND DOORS - MLG DOORS 32-10-00 - 161 - ALTEON PROPRIETARY.
Page 174 777 TRAINING MANUAL NOSE LANDING GEAR AND DOORS -- INTRODUCTION General The forward doors attach to the outer edge of the NLG wheel well. A hydraulic actuator opens and closes the The nose landing gear absorbs landing forces and holds forward doors.
Page 175 777 TRAINING MANUAL NLG DRAG STRUT ASSEMBLY NLG LOCK LINK ASSEMBLY NOSE WHEEL WELL BAFFLE NLG SHOCK STRUT DOOR ACTUATOR NOSE LANDING GEAR TORSION LINKS DOOR FORWARD DOOR FITTING NOSE LANDING GEAR AND DOORS - INTRODUCTION 32-20-00 - 163 - ALTEON PROPRIETARY.
Page 176 777 TRAINING MANUAL NOSE LANDING GEAR AND DOORS -- SHOCK STRUT Purpose There are two spare static seals, one spare dynamic seal, and back-up rings for the spare dynamic seal in The nose landing gear shock strut absorbs airplane the shock strut. The spare seals let you change faulty landing forces and transmits vertical loads to the seals without removal of the inner cylinder.
Page 177 777 TRAINING MANUAL SHOCK STRUT OUTER CYLINDER OUTER CYLINDER SPARE SEAL CARRIER SPARE UPPER DYNAMIC SEAL CHAMBER DYNAMIC SEAL BACKUP RINGS UPPER FOR SPARE STATIC BEARING DYNAMIC SEAL (4) SEAL ASSEMBLY LOWER BEARING SPARE SCRAPER RING DYNAMIC SEAL INNER CYLINDER SPARE LOWER BEARING UPPER AIR...
Page 178 777 TRAINING MANUAL NOSE LANDING GEAR AND DOORS -- DUAL CHAMBER SERVICING Training Information Point The upper air chamber charging valve is on the front of the shock strut outer cylinder. An in-line pressure gage shows the status of the pressure in the upper air chamber.
Page 179 777 TRAINING MANUAL SHUTOFF VALVE (REF) RELIEF VALVE UPPER AIR CHARGING VALVE GREEN BAND NOSE GEAR TRANSDUCER (REF) SHOCK STRUT PSI X 100 NOSE LANDING GEAR CHARGING (TOP VIEW) VALVE PRESSURE GAUGE LOWER FITTING AIR CHAMBER FITTING NOSE LANDING GEAR LOWER AIR CHARGING VALVE...
Page 180 777 TRAINING MANUAL NOSE LANDING GEAR AND DOORS -- DRAG STRUT AND LOCK LINK ASSEMBLIES General Drag strut and lock link assemblies hold the nose landing gear in the extended and retracted positions. Drag Strut Assembly The drag strut assembly has upper and lower struts which attach by a hinge in the center.
Page 181 777 TRAINING MANUAL AFT LOCK LINK LOCK SPRINGS FORWARD LOCK LINK UPPER DRAG STRUT LOWER DRAG STRUT UPPER DRAG STRUT NOSE LANDING GEAR LOCK PIN HOLE LOWER DRAG STRUT LOCK LINK ASSEMBLY NOSE LANDING GEAR AND DOORS - DRAG STRUT AND LOCK LINK ASSEMBLIES 32-20-00 - 169 - ALTEON PROPRIETARY.
Page 182 777 TRAINING MANUAL NOSE LANDING GEAR AND DOORS -- NLG DOORS Nose Landing Gear Doors Two forward and two aft NLG doors aerodynamically seal the nose gear wheel well to reduce drag. Forward Doors The forward doors attach to the outboard edges of the NLG wheel well.
Page 183 777 TRAINING MANUAL NLG FWD HINGE DOORS NLG SIDE BRACE NLG AFT DOOR NLG DOOR ACTUATOR NLG AFT FORWARD DOORS DOOR NOSE LANDING GEAR (LOOKING AFT) NOSE LANDING GEAR AND DOORS - NLG DOORS 32-20-00 - 171 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 184 777 TRAINING MANUAL EXTENSION-RETRACTION -- INTRODUCTION General Extension and retraction lowers and lifts the landing gear. These are part of extension and retraction: The landing gear control system (ATA 32-31) The main landing gear extension and retraction (ATA 32-32) The nose landing gear extension and retraction (ATA 32-34) The landing gear alternate extension system (ATA 32-35).
Page 185 777 TRAINING MANUAL EXTENSION-RETRACTION LANDING GEAR CONTROL SYSTEM MAIN LANDING GEAR SEMI-LEVER EXTENSION AND GEAR RETRACTION NOSE LANDING GEAR EXTENSION AND RETRACTION LANDING GEAR ALTERNATE EXTENSION SYSTEM EXTENSION-RETRACTION - INTRODUCTION 32-30-00 - 173 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 186 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- INTRODUCTION Purpose DOWN position. The solenoid releases the lock when the airplane is in the air. The landing gear control system controls the extension and retraction of the main and nose landing gears, the Auto-off relays in ELMS remove the gear-up signal ten tailskid, and the semi-levered gear operation.
Page 187 777 TRAINING MANUAL GND PROX FLAP GEAR OVRD OVRD INHIBIT NLG EXT-RET OVRD OVRD PROX G/S INHB RETRACT TERR 270K-.82M OVRD DOWN LOCK OVRD NLG SELECTOR/ OVRD BYPASS VALVE ALTN GEAR TAILSKID NORM MLG SELECTOR/ EXTEND DOWN 270K-.82M BYPASS VALVE AUTOBRAKE DISARM MLG EXT-RET...
Page 188 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- LANDING GEAR CONTROL LEVER MODULE Purpose system. See the weather radar system section for more information (AMM PART I 34-43). The landing gear control lever module sends signals to the landing gear selector/bypass valves to extend and The module also has a solenoid controlled lever lock retract the landing gear.
Page 189 777 TRAINING MANUAL GND PROX FLAP GEAR INHIBIT OVRD OVRD OVRD OVRD PROX G/S INHB RETRACT TERR LEVER LOCK 270K-.82M OVRD OVERRIDE SWITCH LOCK OVRD OVRD ALTN LANDING GEAR GEAR LEVER NORM DOWN LOCK SOLENOID EXTEND LEVER LOCK 270K-.82M OVERRIDE SWITCH AUTOBRAKE NLG AND MLG SELECTOR/BYPASS...
Page 190 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- LANDING GEAR SELECTOR/BYPASS VALVES - INTRODUCTION Purpose The NLG selector/bypass valve controls extend and retract pressure to NLG extension and retraction components. The MLG selector/bypass valve controls extend and retract pressure to the left and the right MLG extension and retraction components.
Page 191 777 TRAINING MANUAL NLG SELECTOR/ BYPASS VALVE MLG SELECTOR/ BYPASS VALVE NLG WHEEL WELL RIGHT MLG WHEEL WELL - AFT BULKHEAD DOWN SOLENOID SOLENOID DOWN SOLENOID SOLENOID NLG SELECTOR/BYPASS VALVE MLG SELECTOR/BYPASS VALVE LANDING GEAR CONTROL SYSTEM - LANDING GEAR SELECTOR/BYPASS VALVES - INTRODUCTION 32-31-00 - 179 - ALTEON PROPRIETARY.
Page 192 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- LANDING GEAR SELECTOR/BYPASS VALVES - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-31-00 - 180 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 193 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- LANDING GEAR SELECTOR/BYPASS VALVES - FUNCTIONAL DESCRIPTION General Extension The landing gear selector bypass valves are solenoid- For a gear extension, the down solenoids get power and operated, three-position valves. These are the ground through the down switches in the landing gear positions: control lever module.
Page 194 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- LANDING GEAR SELECTOR/BYPASS VALVES - FUNCTIONAL DESCRIPTION If the selector valve is in the UP or OFF positions, or if there is no pressure in the center hydraulic system, alternate extend pressure moves the bypass valve to BYPASS.
Page 195 777 TRAINING MANUAL UP SOLENOID DOWN SOLENOID OPERATED-VALVE OPERATED-VALVE FROM LANDING GEAR SELECTOR FROM ELMS MODULE DOWN SOLENOID UP SOLENOID SELECTOR VALVE BYPASS VALVE ALTERNATE DOWN EXTEND SYSTEM LANDING GEAR SELECTOR/BYPASS VALVE (SHOWN WITH GEAR SELECTED DOWN) PRESSURE RETURN LANDING GEAR CONTROL SYSTEM - LANDING GEAR SELECTOR/BYPASS VALVES - FUNCTIONAL DESCRIPTION 32-31-00 - 183 - ALTEON PROPRIETARY.
Page 196 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- FUNCTIONAL DESCRIPTION General Auto-Off The landing gear control system controls landing gear After gear retraction, the PSEUs send signals to the extension and retraction. HYDIM cards L and R. After a ten-second delay, the HYDIM cards energize the auto-off relays in the ELMS.
Page 197 777 TRAINING MANUAL 28V DC L MAIN LDG GEAR LEVER LOCK LDG GEAR RETRACT SOLENOID ALTN EXT SYSTEM AUTO OFF AIR MODE RLY (P210) AIR MODE RLY (P110) 28V DC R MAIN RETURN PRESSURE LDG GEAR LEVER LOCK DOWN 28V DC AUTO-OFF L MAIN RELAY A...
Page 198 777 TRAINING MANUAL LANDING GEAR CONTROL SYSTEM -- SLG - FUNCTIONAL DESCRIPTION Semi-Lever Gear Radio altimeter information confirming airplane is on ground The semi-lever gear, hydraulic strut (HS) on each main One or the other thrust lever resolver angle is at landing gear is electrically controlled and or above 40 degrees - from the electronic engine hydraulically operated to lock mid-stroke to help the...
Page 199 777 TRAINING MANUAL RIGHT SLG RIGHT SLG PROX SENSOR COMMAND GND PROX FLAP GEAR OVRD OVRD INHIBIT OVRD OVRD PROX G/S INHB RETRACT TERR 270K-.82M RADIO OVRD LEFT & RIGHT LOCK PSEU 2 OVRD ALTIMETER OVRD AIMS L, R, & C ALTN GEAR NORM...
Page 200 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- INTRODUCTION Purpose valve to operate the main landing gear. See the leading edge slats section for more information about the The MLG extension and retraction system extends and autoslat priority valve (ATA 27-81). retracts the main landing gear. It also opens and closes the main landing gear doors.
Page 201 777 TRAINING MANUAL CENTER AUTOSLAT HYDRAULIC SELECTOR/ MLG DOOR-OPERATED PRIORITY SYSTEM BYPASS SEQUENCE VALVE VALVE PRESSURE VALVE MLG UPLOCK ASSEMBLY AND ACTUATOR MLG GEAR RETRACT ACTUATOR MLG DRAG BRACE-OPERATED SEQUENCE VALVE MLG UPLOCK-OPERATED SEQUENCE VALVE MLG TRUCK POSITIONER MLG DOOR PRIORITY/ ACTUATOR FUSES RELIEF VALVE MLG DOOR UPLOCK...
Page 202 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- GEAR COMPONENT LOCATIONS General These extension and retraction components are on each MLG: Side brace downlock actuator Retract actuator Drag brace downlock actuator Semi-levered gear (SLG) actuator. 32-32-00 - 190 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 203: Main Landing Gear
777 TRAINING MANUAL SIDE BRACE SPINDLE RETRACT ACTUATOR SIDE BRACE DOWNLOCK DRAG BRACE DOWNLOCK SIDE BRACE ACTUATOR ACTUATOR RETRACT ACTUATOR DRAG BRACE SPINDLE DRAG BRACE INBD MAIN LANDING GEAR MLG EXTENSION-RETRACTION - GEAR COMPONENT LOCATIONS 32-32-00 - 191 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 204 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- WHEEL WELL COMPONENT LOCATIONS General These components are in each main gear wheel well: MLG door priority/relief valve MLG door uplock hook and door lock actuator MLG drag brace-operated sequence valve MLG uplock-operated sequence valve MLG uplock assembly and actuator MLG door-operated sequence valve MLG door actuator.
Page 205 777 TRAINING MANUAL MLG UPLOCK-OPERATED SEQUENCE VALVE MLG DOOR PRIORITY/ RELIEF VALVE MLG UPLOCK ASSEMBLY AND ACTUATOR MLG DRAG BRACE-OPERATED SEQUENCE VALVE DRAG BRACE SPINDAL MLG DOOR-OPERATED SEQUENCE VALVE MLG DOOR MLG DOOR UPLOCK MLG DOOR HOOK AND ACTUATOR LOCK ACTUATOR INBD LEFT MLG WHEEL WELL MLG EXTENSION-RETRACTION - WHEEL WELL COMPONENT LOCATIONS...
Page 206 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- MLG RETRACT ACTUATOR Purpose Training Information Point The MLG retract actuator supplies the force to retract You get access to the head end of the actuator through the main landing gear. a removable wing panel from above. Physical Description The retract actuator is a hydraulic piston-type actuator.
Page 207 777 TRAINING MANUAL MLG RETRACT ACTUATOR TRUNNION RETRACT ACTUATOR UPPER SHOCK STRUT RETRACT ACTUATOR RETRACT FITTING TRUNNION LEFT MAIN LANDING GEAR (RIGHT MLG EQUIVALENT) MLG RETRACT ACTUATOR (WING PANEL REMOVED) MLG EXTENSION-RETRACTION - MLG RETRACT ACTUATOR 32-32-00 - 195 - ALTEON PROPRIETARY.
Page 208 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- MLG SIDE BRACE AND DRAG BRACE DOWNLOCK ACTUATORS Purpose The side brace downlock actuator locks and releases the over-center toggles between the side brace lock links during extension and retraction. The drag brace downlock actuator locks and releases the over-center toggles between the drag brace lock links during extension and retraction.
Page 209 777 TRAINING MANUAL SIDE BRACE DRAG DOWNLOCK BRACE ACTUATOR SIDE BRACE UPPER TOGGLE LOWER TOGGLE SIDE BRACE SPRING (2) UPPER SIDE BRACE (ONE HIDDEN) LOCK LINK LOWER SIDE BRACE LOCK LINK MLG SIDE BRACE DOWNLOCK ACTUATOR LEFT MAIN LANDING GEAR (MLG DRAG BRACE DOWNLOCK ACTUATOR ALMOST THE SAME) MLG EXTENSION-RETRACTION - MLG SIDE BRACE AND DRAG BRACE DOWNLOCK ACTUATORS 32-32-00...
Page 210 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- MLG DOOR ACTUATOR AND MLG DOOR-OPERATED SEQUENCE VALVE Purpose The MLG door-operated sequence valve weighs 4.6 pounds (2.1 kg). The MLG door actuator opens and closes the main gear door during gear extension and retraction. Location The MLG door-operated sequence valve controls hydraulic The head end of the MLG door actuator attaches to...
Page 211 777 TRAINING MANUAL MLG DOOR-OPERATED SEQUENCE VALVE INTERMEDIATE CRANK REACTION LINKS INPUT LINK INPUT CRANK MLG DOOR ACTUATOR CONTROL ROD LEFT MLG WHEEL WELL MAIN LANDING GEAR DOOR MLG EXTENSION-RETRACTION - MLG DOOR ACTUATOR AND MLG DOOR-OPERATED SEQUENCE VALVE 32-32-00 - 199 - ALTEON PROPRIETARY.
Page 212 777 TRAINING MANUAL MLG EXTENSION -- MLG DOOR UPLOCK HOOK AND MLG DOOR LOCK ACTUATOR Purpose When the door closes, the roller on the door engages the uplock hook. The motion of the door and pressure in The MLG door uplock hook and MLG door lock actuator are the door lock actuator move the uplock hook to the part of the door uplock assembly.
Page 213 777 TRAINING MANUAL MLG DOOR UPLOCK HOOK DOOR RELEASE/SAFETY VALVE MODULE SAFETY PIN HOLE (REF) DOOR ROLLER INBD UPLOCK SUPPORT MLG DOOR AND UPLOCK ASSEMBLY STRUCTURE (LOOKING FORWARD) MLG DOOR LOCK ACTUATOR MLG DOOR UPLOCK HOOK LOCK SPRING (2) DOOR UPLOCK ASSEMBLY MLG EXTENSION - MLG DOOR UPLOCK HOOK AND MLG DOOR LOCK ACTUATOR 32-32-00 - 201 -...
Page 214 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- MLG UPLOCK ASSY, UPLOCK ACTUATOR, AND UPLOCK-OPERATED SEQUENCE Purpose The MLG uplock actuator attaches horizontally above the MLG uplock mechanism. The MLG uplock assembly holds the main landing gear in the UP position. The MLG uplock-operated sequence valve attaches vertically above the MLG uplock mechanism.
Page 215 777 TRAINING MANUAL MLG UPLOCK- OPERATED SEQUENCE VALVE MLG UPLOCK ACTUATOR INBD MLG UPLOCK ASSEMBLY LEFT MLG WHEEL WELL (LOOKING AFT) MLG UPLOCK ACTUATOR INBD LOCK SPRING MLG UPLOCK ASSEMBLY MLG EXTENSION-RETRACTION - MLG UPLOCK ASSY, UPLOCK ACTUATOR, AND UPLOCK-OPERATED SEQUENCE VALVE 32-32-00 - 203 - ALTEON PROPRIETARY.
Page 216 777 TRAINING MANUAL EXTENSION-RETRACTION -- MLG DRAG BRACE-OPERATED SEQUENCE VALVE Purpose The MLG drag brace-operated sequence valve controls MLG door close operation during landing gear extension. Physical Description The MLG drag brace-operated sequence valve has two positions, GEAR DOWN and GEAR NOT DOWN. Linkage from the upper drag brace spindle moves the valve.
Page 217 777 TRAINING MANUAL UPPER DRAG BRACE SPINDLE DRAG BRACE LEFT MAIN LANDING GEAR DRAG BRACE SPINDLE WING REAR SPAR CONTROL ROD ASSEMBLY DRAG BRACE-OPERATED SEQUENCE VALVE ASSEMBLY INBD EXTENSION-RETRACTION - MLG DRAG BRACE-OPERATED SEQUENCE VALVE 32-32-00 - 205 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 218 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- SLG HYDRALIC STRUT Purpose Location The semi-levered gear (SLG) hydraulic strut (HS) moves The SLG hydraulic strut is on the forward end of the the main landing gear truck forward wheels up. It locks main gear shock strut.
Page 219 777 TRAINING MANUAL LOWER INDICATOR CHAMBER ASSEMBLY HEAD LOCKUP STOW UPPER CHAMBER CHAMBER CHAMBER HEAD TEST PORTS MODE SELECTOR VALVE PRESSURE REDUCER INBD SOLENOID VALVE LEGEND : ______ PRESSURE RETURN MLG EXTENSION-RETRACTION - SLG HYDRALIC STRUT 32-32-00 - 207 - ALTEON PROPRIETARY.
Page 220 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- SLG HYDRALIC STRUT - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-32-00 - 208 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 221: Training Manual
777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- SLG HYDRALIC STRUT - FUNCTIONAL DESCRIPTION Description The full area of the HS floating piston is only used in two modes of operation: The hydraulic strut (HS) has these parts: As a stiff link in tension during takeoff rotation Upper cylinder when the orifice is closed (locked) Larger diameter lower cylinder...
Page 222 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- SLG HYDRALIC STRUT - FUNCTIONAL DESCRIPTION Locked Position During gear retraction, the stow line pressure changes from 50 psi to 3000 psi. This moves the piston to the During taxi-out or at the start of takeoff roll, the HS bottom of the lower cylinder.
Page 223 777 TRAINING MANUAL UPPER 1150 PSI CYLINDER (SUPPLY/ 1150 RETURN LINE) 1150 1150 1150 STOW CYLINDER 50 PSI 3000 50 PSI 50 PSI (STOW LINE) 50 PSI DAMPING/ CLOSED OPEN LOCKOUT ORIFICE LOWER (OPEN) CYLINDER OPEN STATIC OR TAXI POSITION TILT OR POSITION DURING POSITION DURING...
Page 224 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- SLG HYDRALIC STRUT FUSES Purpose The semi-lever gear hydraulic strut (HS) fuses prevent loss of center hydraulic system fluid if there is a leak in the hydraulic lines to the HS. There are fuses in the tilt and stow hydraulic pressure lines that go to each HS.
Page 225 777 TRAINING MANUAL BEAM LEFT MLG (LOOKING OUTBOARD) SEMI-LEVER GEAR HYDRAULIC STRUT FUSES MLG EXTENSION-RETRACTION - SLG HYDRALIC STRUT FUSES 32-32-00 - 213 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 226 777 TRAINING MANUAL MLG EXTENSION -- RETRACTION - MLG DOOR PRIORITY/RELIEF VALVE Purpose The MLG priority/relief valve limits pressure to the MLG door actuator during gear retraction. This makes sure sufficient pressure goes to the truck positioner actuator to move the truck to the STOW position before the gear enters the wheel well.
Page 227 777 TRAINING MANUAL LEFT MLG WHEEL WELL MLG DOOR PRIORITY/RELIEF VALVE (LOOKING AFT) MLG EXTENSION - RETRACTION - MLG DOOR PRIORITY/RELIEF VALVE 32-32-00 - 215 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 228 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- RETRACTION SEQUENCE THIS PAGE INTENTIONALLY LEFT BLANK 32-32-00 - 216 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 229 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- RETRACTION SEQUENCE General Door Opens MLG retraction is the same for the left and right main Pressure through the sequence valves also retracts the gears. MLG door lock actuator to release the main gear door. The MLG door actuator gets extend pressure through the These are the start positions: MLG door priority/relief valve.
Page 230 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- RETRACTION SEQUENCE retract braking function. See the wheels and brakes section for more information (ATA 32-40). Door Closes Pressure also goes to the close side of the MLG door actuator and the lock side of the MLG door lock actuator.
Page 231 777 TRAINING MANUAL MLG DR-OP TO TAIL SEQ VLV MLG SEL/ SKID BYPASS SYSTEM MLG DRAG NOT OPEN OPEN BRACE-OP SEQ VLV UPLOCK-OP LOCK SEQ VLV T0 GEAR RETRACT PRESS UNLK BRAKING FUNCTION STOW SLG HYDRAULIC STRUT MLG DRAG BRACE MLG DR RETRACT DNLK ACT...
Page 232 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- EXTENSION SEQUENCE THIS PAGE INTENTIONALLY LEFT BLANK 32-32-00 - 220 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 233 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- EXTENSION SEQUENCE General Gear Extends - Truck Tilts Main gear extension is the same for the left and right When the MLG door is almost all the way open, the MLG main gear. door-operated sequence valve moves to OPEN. Pressure then goes to the MLG uplock actuator to release the MLG These are the start conditions: uplock.
Page 234 777 TRAINING MANUAL MLG EXTENSION-RETRACTION -- EXTENSION SEQUENCE moves the uplock mechanism over-center to the locked position. Final Condition These are the final conditions of the MLG: MLG - DOWN and LOCKED MLG door - CLOSED and LOCKED SLG hydraulic strut - TILT MLG drag brace-operated sequence valve - DOWN MLG uplock-operated sequence valve - UNLOCKED MLG door-operated sequence valve - NOT OPEN.
Page 235 777 TRAINING MANUAL DOWN NOT DN MLG DR-OP SEQ VLV MLG SEL/ BYPASS MLG DRAG NOT OPEN OPEN BRACE-OP SEQ VLV UNLK LOCK TO TAIL SKID SYSTEM T0 GEAR PRESS RETRACT BRAKING MLG UPLOCK-OP SEQ VLV FUNCTION TILT SLG HYDRAULIC STRUT MLG DRAG BRACE MLG DR...
Page 236 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- INTRODUCTION Purpose The NLG extension-retraction system extends and retracts the nose landing gear and opens and closes the NLG doors. Components These are the NLG extension-retraction components: NLG-operated sequence valve NLG door actuator NLG door-operated sequence valve NLG retract actuator NLG lock actuator NLG locking mechanism.
Page 237 777 TRAINING MANUAL CENTER HYDRAULIC SELECTOR/ NLG-OPERATED SYSTEM BYPASS SEQUENCE VALVE PRESSURE VALVE NLG DOOR-OPERATED SEQUENCE VALVE NLG DOOR ACTUATOR NLG LOCKING MECHANISM NLG LOCK ACTUATOR RETRACT ACTUATOR NLG EXTENSION-RETRACTION - INTRODUCTION 32-34-00 - 225 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 238 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- COMPONENT LOCATIONS General These are the components in the NLG wheel well: NLG retract actuator NLG-operated sequence valve NLG lock actuator NLG lock mechanism NLG door-operated sequence valve NLG door actuator. 32-34-00 - 226 - ALTEON PROPRIETARY.
Page 239 777 TRAINING MANUAL NLG DOOR-OPERATED SEQUENCE VALVE NLG RETRACT ACTUATOR NLG-OPERATED SEQUENCE VALVE NLG DOOR ACTUATOR NLG LOCK MECHANISM AND LOCK ACTUATOR NOSE LANDING GEAR NLG WHEEL WELL - (LOOKING FORWARD) NLG EXTENSION-RETRACTION - COMPONENT LOCATIONS 32-34-00 - 227 - ALTEON PROPRIETARY.
Page 240 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- NLG RETRACT ACTUATOR Purpose The NLG retract actuator supplies the force to retract the nose landing gear. Physical Description The NLG gear retract actuator is a two-position piston- type actuator. The rod end attaches to the right side brace for the NLG.
Page 241 777 TRAINING MANUAL NLG RETRACT ACTUATOR NLG SIDE BRACE NLG WHEEL WELL - LOOKING AFT NLG RETRACT ACTUATOR NLG EXTENSION-RETRACTION - NLG RETRACT ACTUATOR 32-34-00 - 229 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 242 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- NLG LOCKING MECHANISM AND NLG LOCK ACTUATOR Purpose The NLG locking mechanism holds the NLG in the extended or the retracted position. The NLG lock actuator unlocks the NLG locking mechanism at the start of an extension or retraction. It also locks the mechanism when the NLG is fully extended or fully retracted.
Page 243 777 TRAINING MANUAL LOCK SPRINGS AFT LOCK LINK DRAG STRUT ASSEMBLY FORWARD LOCK LINK NLG SHOCK STRUT AFT LOCK LINK NLG LOCKING MECHANISM NLG WHEEL WELL AFT BULKHEAD NLG LOCK ACTUATOR NLG EXTENSION-RETRACTION - NLG LOCKING MECHANISM AND NLG LOCK ACTUATOR 32-34-00 - 231 - ALTEON PROPRIETARY.
Page 244 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- NLG LOCKING MECHANISM AND NLG LOCK ACTUATOR - FUNCTIONAL Retraction Before gear retraction, the NLG lock actuator retracts. This unlocks the NLG locking mechanism and permits the NLG to retract. The hydraulic pressure stays on the retract side of the NLG lock actuator while the gear is in transit.
Page 245 777 TRAINING MANUAL NLG LOCKING MECHANISM OVERCENTER NLG LOCKING MECHANISM UNLOCKED NLG LOCK ACTUATOR NLG LOCKING MECHANISM OVERCENTER NLG DOWN AND LOCKED NLG IN-TRANSIT NLG UP AND LOCKED NLG EXTENSION-RETRACTION - NLG LOCKING MECHANISM AND NLG LOCK ACTUATOR - FUNCTIONAL DESCRIPTION 32-34-00 - 233 - ALTEON PROPRIETARY.
Page 246 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- NLG-OPERATED SEQUENCE VALVE Purpose The NLG-operated sequence valve makes sure that the doors move only if the NLG is in the retracted or the extended position. It makes sure that the doors do not move if the NLG is in-transit.
Page 247 777 TRAINING MANUAL NLG-OPERATED SEQUENCE VALVE NLG LOCKING LINKAGE MECHANISM NLG-OPERATED SEQUENCE VALVE NOSE LANDING GEAR (LOOKING AFT) NLG EXTENSION-RETRACTION - NLG-OPERATED SEQUENCE VALVE 32-34-00 - 235 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 248 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- NLG DOOR ACTUATOR AND NLG DOOR-OPERATED SEQUENCE VALVE Purpose attaches to a bracket on the wheel well ceiling. The rod end attaches to a crank. The crank moves both The NLG door actuator opens and closes the NLG forward forward doors through rods.
Page 249 777 TRAINING MANUAL NLG WHEEL WELL NLG DOOR-OPERATED (LOOKING FORWARD) SEQUENCE VALVE NLG DOOR ACTUATOR LINKAGE LEFT FWD NLG DOOR HINGE NLG EXTENSION-RETRACTION - NLG DOOR ACTUATOR AND NLG DOOR-OPERATED SEQUENCE VALVE 32-34-00 - 237 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 250 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- RETRACTION SEQUENCE Initial Position This keeps pressure on the open side of the door actuator. These are the initial positions for NLG components: Doors Close - Gear Locks NLG - DOWN AND LOCKED NLG doors - CLOSED When the NLG is almost all the way up, the NLG-operated NLG-operated sequence valve - GEAR DOWN sequence valve moves to the UP position.
Page 251 777 TRAINING MANUAL TO NOSE GEAR STEERING DOWN NLG SELECTOR BYPASS VLV GEAR UP GEAR-IN-TRANSIT GEAR DOWN NLG-OPR SEQ VLV CLOSED OPEN NLG DOOR-OPERATED SEQ VALVE NLG DOOR RELEASE/ SAFETY TO CENTER VALVE SYSTEM DOOR RETURN OPEN NLG LOCK ACTUATOR GEAR UP NLG DOOR ACTUATOR...
Page 252 777 TRAINING MANUAL NLG EXTENSION-RETRACTION -- EXTENSION SEQUENCE Initial Positions The NLG extends by the force of its own weight and by airloads. As the NLG starts to extend, the NLG-operated These are the initial positions for the nose gear sequence valve moves to the GEAR-IN-TRANSIT position.
Page 253 777 TRAINING MANUAL TO NOSE GEAR STEERING DOWN NLG-OPR SEQ VLV NLG SELECTOR BYPASS VLV GEAR-IN-TRANSIT GEAR DOWN GEAR UP CLOSED OPEN NLG DOOR-OPERATED SEQ VALVE NLG DOOR RELEASE/ SAFETY TO CENTER VALVE SYSTEM DR OPEN RETURN GR DN NLG DOOR ACTUATOR LK DN NLG RETRACT...
Page 254 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- INTRODUCTION Purpose The alternate extend power pack has a hydraulic pump operated by an electric motor. The alternate extend The alternate extension system permits you to extend power pack pressurizes fluid from the center hydraulic the landing gear when there is no center hydraulic system.
Page 255 777 TRAINING MANUAL CENTER HYDRAULIC SYSTEM FLUID HOT BATTERY BUS POWER LEFT MLG LEFT MLG ALTERNATE EXTEND DOOR RELEASE/ ELMS ALTERNATE UPLOCK POWER PACK SAFETY VALVE RELEASE ACTUATOR MODULE RIGHT MLG RIGHT MLG DOOR RELEASE/ ALTERNATE UPLOCK SAFETY VALVE RELEASE ACTUATOR MODULE NLG DOOR NLG ALTERNATE...
Page 256 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- COMPONENT LOCATIONS Main Landing Gear Wheel Well These components are in each main landing gear wheel well: Main landing gear door release/safety valve module Main landing gear alternate uplock release actuator. The alternate extend power pack is in the left main landing gear wheel well.
Page 257 777 TRAINING MANUAL ALTERNATE EXTEND MLG ALTERNATE UPLOCK MLG DOOR HYDRAULIC PRESSURE RELEASE ACTUATOR SWITCH RELEASE/SAFETY VALVE MODULE NLG ALTERNATE UPLOCK RELEASE ACTUATOR ALTERNATE EXTEND POWER PACK (LEFT MAIN GEAR WHEEL WELL ONLY) NLG DOOR RELEASE/SAFETY INBD VALVE MODULE LEFT MLG WHEEL WELL NOSE LANDING GEAR (LOOKING AFT) NLG WHEEL WELL...
Page 258 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- ALTERNATE GEAR SWITCH General The alternate gear switch is on the landing gear panel on the P2 center forward panel. This switch is a guarded, two-position toggle switch. The positions of the switch are NORM and DOWN. The switch is spring-loaded to the NORM position.
Page 259 777 TRAINING MANUAL GND PROX FLAP GEAR INHIBIT OVRD OVRD OVRD OVRD ALTERNATE PROX GEAR SWITCH G/S INHB RETRACT TERR 270K-.82M OVRD LOCK OVRD OVRD ALTN GEAR NORM LANDING GEAR LEVER (REF) ALTERNATE GEAR SWITCH DOWN EXTEND 270K-.82M AUTOBRAKE DISARM AUTO LANDING GEAR PANEL (P2) LANDING GEAR ALTERNATE EXTENSION SYSTEM - ALTERNATE GEAR SWITCH...
Page 260 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- GROUND DOOR OPERATION CONTROLS Purpose doors (MLG and NLG). This operates the LG alternate extension system. Ground door switches permit you to open and close the landing gear doors on the ground. You move the arm doors switch to the ARM DOORS position and the all doors open/MLG doors close switch to the Location...
Page 261 777 TRAINING MANUAL ALL DOORS OPEN/ ARM DOORS MLG DOORS CLOSE SWITCH SWITCH MLG DOORS CLOSE S32018 ALL DOORS DOORS OPEN MLG DOOR UNSAFE LT PRESS TO TEST NLG DOORS NLG DOORS S32017 ARM SWITCH CLOSE SWITCH OPEN P40 SERVICE AND APU SHUTDOWN P56 WHEEL WELL ELECTRICAL PANEL (TYPICAL) SERVICE PANEL...
Page 262 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- ALTERNATE EXTEND POWER PACK Purpose A leak in the alternate extension system does not drain all the fluid from the center hydraulic system The alternate extend power pack supplies hydraulic reservoir. pressure to the alternate extension system.
Page 263 777 TRAINING MANUAL NORMAL FLUID LEVEL REFILL LEVEL CENTER SYSTEM HYDRAULIC RESERVOIR OVERSIZE TUBE LEFT MAIN LANDING GEAR WHEEL WELL ALTERNATE EXTEND POWER PACK TO DOOR RELEASE/ SAFETY VALVE MODULE (3) ELECTRICAL CONNECTOR SUPPLY FROM OVERSIZE TUBE PRESSURE OUTPUT PRESSURE ALTERNATE EXTEND POWER PACK SUPPLY LANDING GEAR ALTERNATE EXTENSION SYSTEM - ALTERNATE EXTEND POWER PACK...
Page 264 777 TRAINING MANUAL LANDING GEAR ALTN EXTENSION SYSTEM -- DOOR RELEASE/SAFETY VALVE MODULES - GENERAL DESCRIPTION Purpose Location There is one main landing gear door release/safety The main landing gear door release/safety valve modules valve module for each main landing gear. There is one are in the door uplock assembly.
Page 265 777 TRAINING MANUAL MLG DOOR LOCK PIN INBD HOLE INBD LEFT MAIN GEAR WHEEL WELL MLG DOOR RELEASE/ LEFT MLG DOOR UPLOCK ASSEMBLY SAFETY VALVE MODULE NLG DOOR RELEASE/ SAFETY VALVE MODULE NOSE LANDING GEAR CRANK DOOR RELEASE/SAFETY VALVE MODULE NLG DOOR NLG DOOR ACTUATOR...
Page 266 777 TRAINING MANUAL LANDING GEAR ALTN EXTENSION SYSTEM -- DOOR RELEASE/SAFETY VALVE MODS - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-35-00 - 254 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 267 777 TRAINING MANUAL LANDING GEAR ALTN EXTENSION SYSTEM -- DOOR RELEASE/SAFETY VALVE MODS - FUNCTIONAL DESCRIPTION General An internal spring returns the door release actuator to its retracted position after the power pack stops Each door release/safety valve module contains these operation.
Page 268 777 TRAINING MANUAL LANDING GEAR ALTN EXTENSION SYSTEM -- DOOR RELEASE/SAFETY VALVE MODS - FUNCTIONAL DESCRIPTION After hydraulic pressure releases the latch, a spring moves the safety valve to the NORMAL position. The hydraulic pressure then goes to the door actuator and the door closes.
Page 269 777 TRAINING MANUAL TO DOOR ACTUATOR FROM ALTERNATE NORMAL SAFE EXTEND POWER PACK SAFETY VALVE DOOR SAFETY LATCH UNLOCK DOOR VALVE DOOR RELEASE ACTUATOR RESET TO ALTERNATE UPLOCK RELEASE ACTUATOR SOLENOID- OPERATED SAFETY PIN VALVE HOLE SAFETY VALVE LATCH POSITION SENSING SWITCH SAFE SIGNAL TO...
Page 270 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- MLG ALTERNATE UPLOCK RELEASE ACTUATOR General The MLG alternate uplock release actuators supply the force to unlock the MLG uplocks. This permits the MLG to extend by gravity and airloads. There is one MLG alternate uplock release actuator for each main landing gear.
Page 271 777 TRAINING MANUAL MAIN LANDING GEAR UPLOCK ASSEMBLY MLG UPLOCK ACTUATOR (REF) LEFT MAIN GEAR WHEEL WELL MLG ALTERNATE UPLOCK RELEASE ACTUATOR CRANK LEFT MLG UPLOCK ASSEMBLY (LOOKING FORWARD) LANDING GEAR ALTERNATE EXTENSION SYSTEM - MLG ALTERNATE UPLOCK RELEASE ACTUATOR 32-35-00 - 259 - ALTEON PROPRIETARY.
Page 272 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- NLG ALTERNATE UPLOCK RELEASE ACTUATOR Purpose The nose landing gear alternate uplock release actuator supplies the force to unlock the nose landing gear lock link mechanism. This permits the nose landing gear to extend by gravity and airloads.
Page 273 777 TRAINING MANUAL CEILING NLG ALTERNATE UPLOCK RELEASE ACTUATOR AFT BULKHEAD CRANK AND ROLLER NLG ALTERNATE UPLOCK RELEASE ACTUATOR NLG LOCK LINKS NLG LOCKING MECHANISM NLG WHEEL WELL (AFT) NLG ALTERNATE UPLOCK RELEASE (NLG RETRACTED) (SIDE VIEW) LANDING GEAR ALTERNATE EXTENSION SYSTEM - NLG ALTERNATE UPLOCK RELEASE ACTUATOR 32-35-00 - 261 - ALTEON PROPRIETARY.
Page 274 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- ALTERNATE EXTEND HYDRAULIC PRESSURE SWITCH Purpose The alternate extend hydraulic pressure switch stops the alternate extend power pack when the extend cycle is complete. Location The alternate extend hydraulic pressure switch is on the ceiling in the NLG wheel well.
Page 275 777 TRAINING MANUAL ALTERNATE EXTEND HYDRAULIC PRESSURE SWITCH NLG ALTERNATE UPLOCK RELEASE ACTUATOR (REF) NOSE LANDING GEAR WHEEL WELL (AFT) LANDING GEAR ALTERNATE EXTENSION SYSTEM - ALTERNATE EXTEND HYDRAULIC PRESSURE SWITCH 32-35-00 - 263 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 276 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- LANDING GEAR DOOR UNSAFE LIGHTS Purpose GEAR IS IN A NOT SAFE CONDITION AND CAN ACCIDENTALLY CLOSE. THE DOORS CLOSE QUICKLY A red landing gear door unsafe light is in each wheel AND CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO well.
Page 277 777 TRAINING MANUAL NLG DOOR UNSAFE LIGHT NLG WHEEL WELL (LOOKING FWD) NLG DOORS UNSAFE LIGHT PRESS-TO-TEST P40 SERVICE AND APU SHUTDOWN PANEL MLG DOORS CLOSE S32018 MLG DOOR UNSAFE LIGHT ALL DOORS DOORS OPEN MLG DOOR MLG DOOR UNSAFE LIGHT UNSAFE LT PRESS TO TEST PRESS-TO-TEST...
Page 278 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- LANDING GEAR DOOR CLOSED SWITCHES Purpose The landing gear door closed switches supply landing gear door position input to control landing gear door unsafe light operation. Each main landing gear door has a MLG door closed switch.
Page 279 777 TRAINING MANUAL NLG WHEEL WELL FORWARD BULKHEAD LEFT MLG WHEEL WELL MLG DOOR CLOSED SWITCH MLG WHEEL WELL FORWARD BULKHEAD DOOR DOOR NLG DOOR (CLOSED) (CLOSED) CLOSED SWITCH OUTBD LANDING GEAR ALTERNATE EXTENSION SYSTEM - LANDING GEAR DOOR CLOSED SWITCHES 32-35-00 - 267 - ALTEON PROPRIETARY.
Page 280 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- LG DOOR UNSAFE LIGHTS - FUNCTIONAL DESCRIPTION General Training Information Point The landing gear door unsafe lights come on when a During normal operation of the landing gear extension- landing gear door is open and the safety valve in the retraction system, the safety valves in the door landing gear door release/safety valve module is in the release/safety valve modules are in the NORMAL...
Page 281 777 TRAINING MANUAL TEST CLOSED NLG DOOR NLG UNSAFE SAFE UNSAFE NLG DOOR LT PTT (P40) LIGHT CLOSED SW NORMAL SAFETY VALVE POS SENS SW NLG DOOR RELEASE/ SAFETY VALVE MODULE CLOSED R MLG DOOR 28V DC SAFE UNSAFE R MLG DOOR HOT BAT.
Page 282 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - ELECTRICAL THIS PAGE INTENTIONALLY LEFT BLANK 32-35-00 - 270 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 283 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - ELECTRICAL General Ground Door Operation A switch on the P2 center instrument panel or switches Ground door operation is almost the same as operation on the wheel well electrical service panel (P56) start with the alternate gear switch.
Page 284 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - ELECTRICAL Training Information Point To manually remove power from the alternate extension system, you pull the LDG GR ALTN EXT MOT circuit breaker on the P11 panel. This circuit breaker controls the LDG GR ALTN EXT MOT REMOTE circuit breaker on the P310 standby power management panel.
Page 285: Status Display
777 TRAINING MANUAL 28V DC HOT BAT. BUS CONT LDG GR ALTN 2100 EXT MOT REMOTE ALTERNATE 1700 P310 STBY PWR EXTEND MGMT PNL POWER PACK ALTN EXT NORM HYD PRESS 28V DC HOT ALTN EXTEND ALTN EXTEND SWITCH BAT. BUS CONTROL CONTROL RELAY A (P320)
Page 286 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - HYDRAULIC THIS PAGE INTENTIONALLY LEFT BLANK 32-35-00 - 274 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 287 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - HYDRAULIC After the door release actuator extends, it sends General pressure to the landing gear alternate uplock release actuator. The alternate extend power pack pressurizes hydraulic fluid from the center hydraulic system. Landing Gear Alternate Uplock Release Actuator Pressure goes to the MLG and the NLG selector/bypass The landing gear alternate uplock release actuator...
Page 288 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- FUNCTIONAL DESCRIPTION - HYDRAULIC safety valve gets a reset by an electric signal to the solenoid operated valve. Switches on the P40 and P56 panels or a switch in the landing gear control lever module supply the reset signal.
Page 289 777 TRAINING MANUAL TO MLG AND NLG CTR HYD SELECTOR/BYPASS TO DOOR SYS FLUID VALVES ACTUATOR ALTERNATE NORMAL SAFE EXTEND POWER PACK OVERSIZE DOOR SAFETY SUPPLY TUBE UNLOCK DOOR VALVE DOOR RELEASE ACTUATOR TO LEFT AND RIGHT MLG DOOR RELEASE/SAFETY VALVE MODULES RESET ALTN EXT...
Page 290 777 TRAINING MANUAL LANDING GEAR ALTERNATE EXTENSION SYSTEM -- LANDING GEAR DOOR CLOSE OPERATION General For any door close signal, power from the 28v dc left main bus goes to the solenoid valves in the landing You can close the landing gear doors with the door gear door release/safety valve modules.
Page 291 777 TRAINING MANUAL 28V DC CLOSE NLG DOOR L MAIN RELEASE/SAFETY VALVE MODULE LDG GR DR (SOLENOID VALVE) CLOSE GND NLG DOORS ACCESS ARM SW (P40) NLG DOORS P110 LEFT POWER CLOSE (P40) MGMT PANEL DOWN LG CONTROL CLOSE RIGHT MLG DOOR LEVER MODULE 5 SEC RELEASE/SAFETY...
Page 292 777 TRAINING MANUAL LANDING GEAR -- DOWNLOCK PINS - MAIN LANDING GEAR General There are two main landing gear downlock pins for each main landing gear. The pins install in the upper side brace lock link and the upper drag brace lock link. Each pin holds the upper toggle and the upper lock link together.
Page 293 777 TRAINING MANUAL UPPER TOGGLE UPPER TOGGLE UPPER SIDE BRACE LOCK LINK UPPER DRAG BRACE LOCK LINK DOWNLOCK PIN HOLE LOWER LOWER TOGGLE DOWNLOCK SIDE BRACE PIN HOLE LOCK LINK LOWER MLG SIDE BRACE LOCK LINKS LOWER TOGGLE DRAG BRACE LOCK LINK MLG DRAG BRACE LOCK LINKS SIDE BRACE...
Page 294 777 TRAINING MANUAL LANDING GEAR -- DOOR LOCKS - MAIN LANDING GEAR General Door lock pins prevent the MLG doors from being closed. The pins go in the MLG door release/safety valve module in each main landing gear wheel well. When installed, the pins prevent the safety valve from moving to the unsafe position.
Page 295 777 TRAINING MANUAL DOOR LOCK PIN HOLE DOOR LOCK PIN HOLE DOOR UPLOCK HOOK DOOR UPLOCK HOOK MLG DOOR UPLOCK HOOK SUPPORT STRUCTURE - LEFT MLG MLG DOOR UPLOCK HOOK SUPPORT STRUCTURE - RIGHT MLG LANDING GEAR - DOOR LOCKS - MAIN LANDING GEAR 32-00-00 - 283 - ALTEON PROPRIETARY.
Page 296 777 TRAINING MANUAL LANDING GEAR -- DOWNLOCK PIN - NOSE LANDING GEAR General The nose landing gear downlock pin installs in the NLG lock link. 32-00-00 - 284 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 297: Nose Landing Gear
777 TRAINING MANUAL DOWNLOCK PIN HOLE NOSE LANDING GEAR NOSE LANDING GEAR LOCKING MECHANISM LANDING GEAR - DOWNLOCK PIN - NOSE LANDING GEAR 32-00-00 - 285 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 298 777 TRAINING MANUAL LANDING GEAR -- DOOR LOCK - NOSE LANDING GEAR General The NLG door lock pin prevents the nose landing gear doors from being closed. The pin goes in the NLG door release/safety valve module on the forward bulkhead of the NLG wheel well. When installed, the pin prevents the movement of the safety valve to the unsafe position.
Page 299 777 TRAINING MANUAL NLG DOOR RELEASE/SAFETY VALVE MODULE NOSE LANDING GEAR WHEEL WELL (LOOKING FORWARD) SAFETY PIN HOLE NLG DOOR ACTUATOR LANDING GEAR - DOOR LOCK - NOSE LANDING GEAR 32-00-00 - 287 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 300 777 TRAINING MANUAL LANDING GEAR -- LOCK PIN - TAIL SKID General The tail skid lock pin prevents tail skid actuation. The pin goes in the tail skid lock links. You get access to the lock links through the stabilizer compartment forward access door.
Page 301 777 TRAINING MANUAL LOCK STABILIZER COMPARTMENT HOLE SERVICE ACCESS DOOR TAIL SKID LOCK LINKS STABILIZER LOCK COMPARTMENT HOLE LOCK HOLE TAIL SKID (RETRACTED) TAIL SKID (EXTENDED) LANDING GEAR - LOCK PIN - TAIL SKID 32-00-00 - 289 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 302 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- INTRODUCTION Purpose EICAS - engine indication and crew alerting system The proximity sensor system (PSS) uses two proximity - forward sensor electronics units (PSEUs) to supply position - ground data for these systems: hdlg - handling - lever...
Page 303 777 TRAINING MANUAL PASSENGER ENTRY DOORS CARGO AND ACCESS DOORS THRUST REVERSER LANDING GEAR PASSENGER ENTRY DOORS THRUST REVERSER CARGO DOORS PSEU 1 LANDING GEAR EQUIPMENT CENTER TAIL STRIKE ACCESS DOORS TAIL SKID SYSTEM SYSTEM PSEU 2 THRUST REVERSERS TAIL STRIKE SYSTEM LEGEND TAIL SKID...
Page 304 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- GENERAL DESCRIPTION General Warning electronic unit (WEU) Cabin system management unit (CSMU) The PSS gets position data for some airplane components Audio management unit (AMU) and supplies this data to other airplane systems for Cargo smoke detection system (CSDS).
Page 305 777 TRAINING MANUAL SYSTEMS ARINC 629 BUSES ELMS PROXIMITY SENSORS PSEU 1 - LANDING GEAR - PASSENGER ENTRY DOOR - CARGO AND ACCESS DOOR - THRUST REVERSER CSDS AIMS - TAIL SKID DISCRETE INPUTS - TAIL STRIKE SYSTEM - OTHER DISCRETE INPUTS PSEU 2 ELMS BSCU...
Page 306 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PROXIMITY SENSORS Purpose Training Information Point The proximity sensors get position input of airplane The targets are made of corrosion-resistant steel. components. They supply this position data to the Usual target sizes are 0.05 in (1.3 mm) thick and 1.25 PSEUs.
Page 307 777 TRAINING MANUAL THREAD MOUNT SENSOR FLANGE MOUNT SENSOR TARGET SENSOR PSEU PROXIMITY SENSOR SYSTEM - PROXIMITY SENSORS 32-08-00 - 295 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 308 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU - COMPONENT LOCATION Purpose The PSEUs are the central components of the proximity sensor system. They get proximity sensor input and other discrete signals. The PSEUs process this data and send control and indication signals to other airplane systems.
Page 309 777 TRAINING MANUAL E1-5 SHELF E4-1 SHELF - PSEU 1 - PSEU 2 MAIN EQUIPMENT CENTER MAIN EQUIPMENT CENTER (LOOKING AFT) (LOOKING FORWARD) PSEU (TYPICAL) PROXIMITY SENSOR SYSTEM - PSEU - COMPONENT LOCATION 32-08-00 - 297 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 310 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU - CIRCUIT CARDS General The proximity driver cards are interchangeable. PSEU 1 and PSEU 2 contain 8 circuit cards. Auxiliary/Driver Card These are the 4 different types of circuit cards: The auxiliary driver card in PSEU 1 contains the cargo door control power supply and controls the cargo door Communication/processor card operation.
Page 311 777 TRAINING MANUAL PSEU 1 PSEU 2 1. POWER SUPPLY CARD 2. COMMUNICATION / PROCESSOR CARD 3. PROXIMITY DRIVER CARD 4. AUXILIARY DRIVER CARD PROXIMITY SENSOR SYSTEM - PSEU - CIRCUIT CARDS 32-08-00 - 299 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 312: Functional Description
777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 1 - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-08-00 - 300 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 313: Training Manual
777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 1 - FUNCTIONAL DESCRIPTION General Power Supply PSEU 1 uses signals from proximity sensors and from The 28v dc left main bus is the primary power source to discrete inputs. It sends out signals on the ARINC 629 PSEU 1.
Page 314 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 1 - FUNCTIONAL DESCRIPTION auxiliary driver card control the operation of the The sensor position and health signals go through the cargo doors. The ground handling bus supplies power to communication/processor card to other airplane systems. the cargo door control on the auxiliary driver card only on the ground.
Page 315 777 TRAINING MANUAL 28V DC LEFT LEFT ARINC 629 MAIN BUS - PRIMARY PWR - BITE SYSTEM PSEU 1 PRI POWER SUPPLY CARD COMM/PROCESSOR CARD POWER SHARED RESOURCES P110 LEFT PWR MGMT PNL - LANDING GEAR - CARGO DOOR SENSORS INDICATION PSEU 2 - TAIL STRIKE...
Page 316 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 2 - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-08-00 - 304 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 317 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 2 - FUNCTIONAL DESCRIPTION General Power Supply PSEU 2 uses signals from proximity sensors and from The 28v dc right main bus is the primary power source discrete inputs. PSEU 2 sends out the signals on the to the PSEU.
Page 318 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- PSEU 2 - FUNCTIONAL DESCRIPTION Landing Gear/Tail Strike/Tail Skid The same proximity driver card also finds the target position for the right escape slide compartment door. The landing gear/tail strike/tail skid function uses these cards: The sensor position and health signals go through the communication/processor card to other airplane systems.
Page 319 777 TRAINING MANUAL 28V DC RIGHT LEFT ARINC 629 MAIN BUS - PRIMARY PWR -BITE SYSTEM PSEU 2 PRI POWER SUPPLY CARD COMM/PROCESSOR CARD POWER SHARED RESOURCES P110 LEFT PWR MGMT PNL - LANDING GEAR - DOOR INDICATION INDICATION PSEU 1 PROX DRIVER CARD - TAIL STRIKE ARINC 429 BUS...
Page 320 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- SYSTEM TESTS General These are the system tests for the proximity sensor system: M32021 PSEU #1 M32025 PSEU #2. The system tests do a test for the correct operation and installation of the PSEUs. 32-08-00 - 308 - ALTEON PROPRIETARY.
Page 321 777 TRAINING MANUAL Select System Test 32 PROXIMITY SENSOR SYSTEM (PSS) SYSTEM TESTS: M32021 PSEU #1 GROUND TESTS M32025 PSEU #2 Select ATA System (55) Select Test Type 31 AIMS - Flight Data Recorder System SYSTEM 31 Printer TEST 31 AIMS - Airplane Condition Monitoring System 31 AIMS - Left AIMS OPERATIONAL 31 AIMS - Right AIMS...
Page 322 777 TRAINING MANUAL PROXIMITY SENSOR SYSTEM -- OPERATIONAL TESTS General These are the operational tests for the proximity sensor system: PSEU 1 - Power Supply - Primary PSEU 1 - Primary Communication/Processor PSEU 1 - Cargo Door Power Supply / Flight Locks PSEU 1 - Cargo Door Control PSEU 1 - Landing Gear PSEU 1 - Thrust Reverser...
Page 323 777 TRAINING MANUAL Select Operational Test (24) GROUND TESTS 32 Proximity Sensor System (PSS) Operational Tests: Select ATA System (60) Select Test Type PSEU 1 - Power Supply - Primary 31 AIMS - Flight Data Recorder System SYSTEM 31 Printer TEST 31 AIMS - Airplane Condition Monitoring System PSEU 1 - Primary Communication/Processor...
Page 324 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INTRODUCTION Purpose General Description The landing gear position indicating and warning system The landing gear position indicating and warning system shows landing gear position on the flight compartment is a dual redundant system. Each PSEU gets position displays.
Page 325 777 TRAINING MANUAL MLG UP AND LOCKED SENSORS MLG SIDE BRACE DN SENSORS MLG DRAG BRACE DN SENSORS MLG DOOR CLOSED SENSORS MLG TRUCK TILT SENSORS NLG LOCKED SENSOR NLG UP SENSOR PSEU 1 AIMS NLG DOWN SENSOR NLG DOOR CLOSED SENSOR NLG NOT-COMP SENSOR LEFT MLG SLG SENSOR LANDING GEAR LVR POS...
Page 326 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- MLG UP AND LOCKED PROXIMITY SENSORS Purpose Two MLG up and locked sensors on each MLG supply uplock input to the PSEUs. Location The sensors are on the forward and aft sides of the MLG uplock assembly.
Page 327 777 TRAINING MANUAL MLG UPLOCK ACTUATOR (REF) LEFT MLG WHEEL WELL MLG UP AND LOCKED PROXIMITY SENSOR (FWD SENSOR NOT SHOWN) MLG UP AND LOCKED PROXIMITY SENSOR MLG UPLOCK OUTBD TARGET (FWD TARGET HOOK (REF) NOT SHOWN) MLG UPLOCK ASSEMBLY (LOOKING FORWARD) LG POSITION INDICATING AND WARNING SYSTEM - MLG UP AND LOCKED PROXIMITY SENSORS 32-61-00...
Page 328 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- MLG DOWN PROXIMITY SENSORS Purpose Main landing gear down proximity sensors supply downlock data to the PSEUs. There are four MLG down proximity sensors for each MLG. Location The two MLG drag brace down sensors are on the upper drag brace lock link.
Page 329 777 TRAINING MANUAL LOWER SIDE UPPER SIDE UPPER BRACE LOCK BRACE LOCK TOGGLE LINK LINK SIDE BRACE DRAG BRACE LOWER TOGGLE SIDE BRACE DOWN PROXIMITY SENSOR (2 LOCATIONS) SIDE BRACE INBD SPRINGS MLG SIDE BRACE PROXIMITY SENSOR LEFT MAIN LANDING GEAR (MLG DRAG BRACE PROXIMITY SENSOR ALMOST THE SAME) LG POSITION INDICATING AND WARNING SYSTEM - MLG DOWN PROXIMITY SENSORS 32-61-00...
Page 330 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- MLG DOOR CLOSED PROXIMITY SENSORS Purpose Two MLG door closed sensors for each main landing gear door supply door position data to the PSEUs. Location The sensors are on the outboard forward corner of the wheel wells.
Page 331 777 TRAINING MANUAL MAIN LANDING GEAR DOOR MLG DOOR CLOSED PROXIMITY SENSOR (2) PROXIMITY SENSOR TARGET MLG WHEEL WELL FORWARD BULKHEAD MLG DOOR CLOSED PROXIMITY SENSOR (2) OUTBD LEFT MLG WHEEL WELL - MLG DOOR CLOSED (FORWARD OUTBOARD CORNER) INBD LG POSITION INDICATING AND WARNING SYSTEM - MLG DOOR CLOSED PROXIMITY SENSORS 32-61-00 - 319 -...
Page 332 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- NLG LOCKED PROXIMITY SENSORS Purpose Two NLG locked sensors supply nose landing gear lock link lock position data to the PSEUs. Location The sensors are on the aft NLG lock link. The targets are on the forward lock link.
Page 333 777 TRAINING MANUAL NLG LOCKED PROXIMITY SENSOR (2) NLG LOCKED PROXIMITY SENSOR TARGET (2) FORWARD LOCK LINK AFT NLG LOCK LINK NOSE LANDING GEAR NLG LOCKED PROXIMITY SENSORS LG POSITION INDICATING AND WARNING SYSTEM - NLG LOCKED PROXIMITY SENSORS 32-61-00 - 321 - ALTEON PROPRIETARY.
Page 334 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- NLG UP AND NLG DOWN PROXIMITY SENSORS Purpose Two NLG up sensors and two NLG down sensors supply nose gear position data to the PSEUs. Location All four sensors are on the ceiling of the nose landing gear wheel well above the drag brace trunnions.
Page 335: Proximity Sensors
777 TRAINING MANUAL NLG DOWN PROXIMITY SENSOR NLG DOWN NLG UP PROXIMITY SENSOR PROXIMITY SENSORS TARGET NLG WHEEL WELL CEILING NLG DOWN DRAG BRACE PROXIMITY SENSOR TRUNNION NLG DOWN PROXIMITY SENSOR TARGET NLG UP PROXIMITY SENSOR TARGETS NOSE LANDING GEAR NLG UP AND NLG DOWN PROXIMITY SENSORS LG POSITION INDICATING AND WARNING SYSTEM - NLG UP AND NLG DOWN PROXIMITY SENSORS 32-61-00...
Page 336 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- NLG DOOR CLOSED PROXIMITY SENSORS Purpose Two NLG door closed sensors supply NLG door position data to the PSEUs. Location The sensors are on the forward bulkhead of the NLG wheel well.
Page 337 777 TRAINING MANUAL LEFT NLG DOOR CLOSED FORWARD PROXIMITY SENSOR BULKHEAD NOSE LANDING GEAR WHEEL WELL (LOOKING FORWARD) TARGET LEFT NLG FORWARD DOOR NLG DOOR CLOSED PROXIMITY SENSOR LG POSITION INDICATING AND WARNING SYSTEM - NLG DOOR CLOSED PROXIMITY SENSORS 32-61-00 - 325 - ALTEON PROPRIETARY.
Page 338 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- MLG TRUCK TILT PROXIMITY SENSORS Purpose Training Information Point Two MLG truck tilt sensors for each main landing gear The sensor assemblies on the forward part of the MLG supply truck tilt position data to the PSEUs. truck are different than the sensor assemblies on the aft part of the truck.
Page 339 777 TRAINING MANUAL MLG SENSOR TARGET BRACKET ASSEMBLY TARGET PROXIMITY SENSOR INBD LEFT MLG (RIGHT MLG SIMILAR) CONNECTION TO INNER SHOCK STRUT MLG TRUCK TILT SENSOR AND TARGET BRACKET ASSEMBLY LG POSITION INDICATING AND WARNING SYSTEM - MLG TRUCK TILT PROXIMITY SENSORS 32-61-00 - 327 - ALTEON PROPRIETARY.
Page 340 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- MLG TRUCK TILT PRESSURE SENSORS Purpose A truck tilt pressure sensor for each of the MLG truck tilt actuators sends truck tilt pressure data to the HYDIM cards. The HYDIM cards send a high pressure signal to the AIMS when the truck tilt pressure is more than 2500 psi.
Page 341 777 TRAINING MANUAL MLG BEAM MLG TRUCK TILT PRESSURE SENSOR LEFT MLG (LOOKING OUTBOARD) MLG TRUCK POSITIONER ACTUATOR FUSES (REF) LG POSITION INDICATING AND WARNING SYSTEM - MLG TRUCK TILT PRESSURE SENSORS 32-61-00 - 329 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 342 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- SLG PROXIMITY SENSORS Purpose Two semi-levered gear (SLG) sensors monitor the hydraulic struts on the left and right main landing gear. These sensors give input to the PSEUs. Physical Description The semi-lever gear proximity sensors are flange- mounted inductance type sensors.
Page 343 777 TRAINING MANUAL SEMI-LEVERED FLOATING GEAR PROXIMITY PISTON SENSOR LOCKUP PISTON PISTON TARGET TILT POSITION (NOT LOCKED) MLG TRUCK LOCKUP PISTON TARGET LOCKED TILT POSITION FOR TAKEOFF LG POSITION INDICATING AND WARNING SYSTEM - SLG PROXIMITY SENSORS 32-61-00 - 331 - ALTEON PROPRIETARY.
Page 344 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- NLG NOT-COMPRESSED PROXIMITY SENSORS Purpose Two NLG not-compressed sensors supply NLG shock strut compressed - not compressed data to the PSEUs. Location The sensors are on the aft side of the NLG shock strut. The targets attach to the upper torsion link.
Page 345 777 TRAINING MANUAL PROXIMITY SENSOR TARGET UPPER TORSION LINK PROXIMITY SHOCK STRUT SENSOR INNER CYLINDER TARGET LG POSITION INDICATING AND WARNING SYSTEM - NLG NOT-COMPRESSED PROXIMITY SENSORS 32-61-00 - 333 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 346 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INDICATIONS - EICAS DISPLAY General There is a disagreement between the landing gear lever and the landing gear position for more than In normal operation, the EICAS display shows the 40 seconds (normal actuation time is approximately position of the three landing gear with a single symbol 17 seconds for retraction and 23 seconds for...
Page 347 777 TRAINING MANUAL +13c +13c 75.6 75.6 75.6 75.6 DOWN GEAR GEAR EICAS DISPLAY - SINGLE-SYMBOL DISPLAY EICAS DISPLAY - MULTI-SYMBOL DISPLAY SINGLE-SYMBOL DISPLAY MULTI-SYMBOL DISPLAY DOWN - (GREEN) ALL GEAR DOWN AND LOCKED EXPANDED DISPLAY GEAR - (WHITE HATCHED) GEAR IN-TRANSIT - (GREEN) GEAR DOWN AND LOCKED - (WHITE) ALL GEARS UP AND LOCKED (DISPLAY BLANKS AFTER 10 SECONDS)
Page 348 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INDICATIONS - ALERT AND STATUS MESSAGES THIS PAGE INTENTIONALLY LEFT BLANK 32-61-00 - 336 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 349 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INDICATIONS - ALERT AND STATUS MESSAGES Alert Messages Failure of the two up sensors on the same gear Failure of the two door sensors on the same gear These alert messages show for non-normal landing gear Failure of a side brace sensor conditions: Failure of a drag brace sensor...
Page 350 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INDICATIONS - ALERT AND STATUS MESSAGES R GEAR UPLOCK SENSOR NOSE GEAR UP SENSOR. 32-61-00 - 338 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 351: Status Display
777 TRAINING MANUAL +13c CONFIG GEAR GEAR DISAGREE 75.6 75.6 MAIN GEAR BRACE L MAIN GEAR BRACE R GEAR DOOR EICAS DISPLAY GEAR INDICATION SYS L GEAR DOOR SENSOR R GEAR DOOR SENSOR NOSE GEAR DOOR SENSOR L GEAR UPLOCK SENSOR R GEAR UPLOCK SENSOR NOSE GEAR UP SENSOR SEMI-LEVER GEAR...
Page 352 777 TRAINING MANUAL LG POSITION INDICATING AND WARNING SYSTEM -- INDICATIONS - MULTI-FUNCTION DISPLAY General The multi-function display shows landing gear door position data on the landing gear synoptic display. Other landing gear data and PSEU outputs show on the landing gear actuation/indication maintenance page.
Page 353 777 TRAINING MANUAL LANDING GEAR ACTN/INDN AUTO PAGE 2/2 SEMI LEVER GEAR PSEU 1: LSLG PSEU 2: RSLG LOCK NEAR UNLOCK LOCK LANDING GEAR ACTN/INDN PAGE 1/2 PSEU 1 PSEU 2 28 V 28 V TAILSTRIKE NORM NORM ALTN EXT CMD NOT UP NOT UP DOOR...
Page 354 777 TRAINING MANUAL TAIL STRIKE SYSTEM -- INTRODUCTION Purpose The tail strike system supplies tail strike indication to the flight compartment if a tail strike occurs. Tail Strike Assembly The tail strike assembly (TSA) is a blade antenna- shaped device. There are two wires in the assembly that are near the outer surface of the TSA.
Page 355 777 TRAINING MANUAL TAIL STRIKE ASSEMBLY PSEU 1 AIMS SYSTEMS ARINC PSEU 2 629 BUSES TAIL STRIKE SYSTEM - INTRODUCTION 32-71-00 - 343 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 356 777 TRAINING MANUAL TAIL STRIKE SYSTEM -- FUNCTIONAL DESCRIPTION - TAIL STRIKE General TAIL STRIKE CHAN 1 TAIL STRIKE CHAN 2. The two wires in the Tail Strike Assembly (TSA) are on separate channels. Both wires get 28v dc power. One Both of these messages show if there is a tail strike.
Page 357 777 TRAINING MANUAL 28V DC L MAIN PSEU 1 PRI PWR 28V DC R MAIN TAIL SKID TAIL STRIKE LANDING GEAR ACTN/INDN ______________________ ASSEMBLY ASSEMBLY PSEU 2 PSEU 1 PSEU 2 (REF) TAILSTRIKE 28 V GND/OPEN PRI PWR ALTN EXT CMD NORM NORM GEAR LEVER:...
Page 358 777 TRAINING MANUAL TAIL SKID SYSTEM -- INTRODUCTION General Two proximity sensors sense the position of the tail skid. The proximity sensing system monitors these The tail skid system gives some protection for the aft sensors. fuselage structure if there is too much rotation during takeoff or landing.
Page 359 777 TRAINING MANUAL TAIL SKID ACTUATOR TAIL STRIKE ASSEMBLY (REF) SERVICE TAIL SKID ACCESS DOOR PROXIMITY SENSORS ABSORBER ASSEMBLY DRAG LEVER FAIRINGS SKID SHOE SKID SHOE TAIL SKID SYSTEM - INTRODUCTION 32-72-00 - 347 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 360 777 TRAINING MANUAL TAIL SKID SYSTEM -- ABSORBER ASSEMBLY, DRAG LEVER, AND SKID SHOE THIS PAGE INTENTIONALLY LEFT BLANK 32-72-00 - 348 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 361: Training Manual
777 TRAINING MANUAL TAIL SKID SYSTEM -- ABSORBER ASSEMBLY, DRAG LEVER, AND SKID SHOE General indicator assembly attaches to the lower end fitting and is between the outer sleeve and the crushable The drag lever extends below the bottom of the fuselage cartridge.
Page 362 777 TRAINING MANUAL TAIL SKID SYSTEM -- ABSORBER ASSEMBLY, DRAG LEVER, AND SKID SHOE the indicator assembly will show one of these The skid shoe is an LRU. conditions: The tail skid system does not require lubrication. Neither pin is extended (this shows a very low energy skid contact) One pin is extended (this shows a moderate energy skid contact or many soft touches)
Page 363 777 TRAINING MANUAL FUSE PIN UPPER ATTACH LINK LOCK LINKS CRUSHABLE CARTRIDGE UPPER END DRAG LEVER FITTING INDICATOR SKID SHOE ASSEMBLY TAIL SKID OUTER SLEEVE BUMPER STOP LOWER END FITTING DRAG LEVER ABSORBER ASSEMBLY SKID SHOE (CUTAWAY VIEW) INDICATOR ASSEMBLY (SHOWN WITH BOTH PINS EXTENDED) TAIL SKID SYSTEM - ABSORBER ASSEMBLY, DRAG LEVER, AND SKID SHOE 32-72-00...
Page 364 777 TRAINING MANUAL TAIL SKID SYSTEM -- TAIL SKID ACTUATOR - PHYSICAL DESCRIPTION Purpose The actuator rod end attaches to a crank on the forward lock link. The actuator head end attaches to a crank on The tail skid actuator extends and retracts the tail the upper attach link.
Page 365 777 TRAINING MANUAL GEAR DOWN PRESSURE GEAR UP PRESSURE TO RETRACT ACTUATOR TO EXTEND ACTUATOR AND EXTEND TAIL SKID AND RETRACT TAIL SKID STABILIZER COMPARTMENT SERVICE ACCESS DOOR TAIL SKID FORWARD ACTUATOR LOCK LINK BLEED VALVE UPPER ATTACH LINK TAIL SKID ACTUATOR NOTE: ACTUATOR SHOWN WITH PRESSURE GEAR LEVER DOWN,...
Page 366 777 TRAINING MANUAL TAIL SKID SYSTEM -- TAIL SKID ACTUATOR - FUNCTIONAL DESCRIPTION General Tail Skid Retraction The tail skid actuator controls the position of the The tail skid actuator extends to retract the tail tail skid. The tail skid actuator attaches to a crank skid.
Page 367 777 TRAINING MANUAL TAIL SKID TAIL SKID UPPER LOCK LINKS UPPER LOCK LINKS TAIL SKID ATTACH ATTACH LOCK LINKS LINK LINK UPPER ATTACH LINK LOCK HOLE LOCK HOLE TAIL SKID TAIL SKID TAIL SKID (EXTENDED) (IN-TRANSIT) (RETRACTED) TAIL SKID SYSTEM - TAIL SKID ACTUATOR - FUNCTIONAL DESCRIPTION 32-72-00 - 355 - ALTEON PROPRIETARY.
Page 368 777 TRAINING MANUAL TAIL SKID SYSTEM -- TAIL SKID UP AND TAIL SKID DOWN PROXIMITY SENSORS General The tail skid up and tail skid down proximity sensors supply tail skid position data to PSEU 2. These sensors monitor the tail skid mechanism position and the proper operation of the tail skid actuator and mechanism.
Page 369 777 TRAINING MANUAL STABILIZER COMPARTMENT SERVICE ACCESS DOOR UPPER ATTACH TAIL LINK SKID STABILIZER COMPARTMENT UPPER ATTACH LINK SENSOR SENSOR TARGET TAIL SKID UP TAIL SKID DOWN TAIL SKID UP TAIL SKID DOWN TARGET PROXIMITY SENSOR PROXIMITY SENSOR PROXIMITY SENSOR PROXIMITY SENSOR TAIL SKID TAIL SKID...
Page 370 777 TRAINING MANUAL TAIL SKID SYSTEM -- INDICATIONS Alert and Status Messages The tail skid is not down and the landing gear lever is DOWN, and the tail skid down sensor is not The TAIL SKID advisory message shows when the tail skid failed, and alternate extension was not commanded is not in the correct position.
Page 371 777 TRAINING MANUAL LANDING GEAR ACTN/INDN PSEU 1 PSEU 2 TAILSTRIKE 28 V 28 V ALTN EXT CMD NORM NORM GEAR LEVER: NOT UP NOT UP DOWN PWR TAIL SKID DOWN GND NOSE GEAR: LOCK NEAR NEAR GEAR UP GEAR DOWN NEAR NEAR DOOR...
Page 372 777 TRAINING MANUAL AIR/GROUND SYSTEM -- INTRODUCTION Purpose ASCPC - air supply and cabin pressure controller - ARINC signal gateway The air/ground system (AGS) supplies air mode and ARINC - Aeronautical Radio, Inc. ground mode signals to airplane systems. - air traffic control - electronic engine control Components ELMS...
Page 373 777 TRAINING MANUAL MAIN LANDING GEAR BEAM LOAD SENSOR RIGHT WOW CARD ELMS LOAD SENSOR MAIN LANDING GEAR (2) LEFT MLG BEAM RIGHT SYSTEMS CARD FILE LOAD SENSOR OTHER AIRPLANE LEFT WOW CARD SYSTEMS LOAD SENSOR RIGHT MLG BEAM LEFT SYSTEMS CARD FILE AIR/GROUND SYSTEM - INTRODUCTION 32-09-00...
Page 374 777 TRAINING MANUAL AIR/GROUND SYSTEM -- INTERFACES General Electrical load management system (ELMS) Fuel quantity indication system (FQIS) processor Two WOW cards supply air/ground signals to other Flap slat electronic unit (FSEU) (2) airplane systems through: Generator control unit (GCU) (3) Overhead panel bus controller (OPBC) Left and right systems ARINC 629 buses Passenger address/cabin interphone (PA/CI)
Page 375: Training Manual
777 TRAINING MANUAL AIR/GROUND SYSTEM -- INTERFACES APU controls These systems, components, and functions get air/ground Cargo fire extinguishing signals through the air/ground relays: DC standby system Ground crew call horn AIMS Fuel jettison Air data inertial reference unit (ADIRU) on Fuel management battery relay Hydraulic pump control...
Page 376 777 TRAINING MANUAL AIR/GROUND SYSTEM -- INTERFACES AIMS (time and date, flight phase/leg, airplane registration number, ICAO code) Bus power control unit (external power available) ELMS (air/ground relay status) Ground test enable switch Load sensors Radio altitude (RA) transceiver (3). 32-09-00 - 364 - ALTEON PROPRIETARY.
Page 377 777 TRAINING MANUAL AIR/GND RELAYS USER SYSTEMS PWR MGMT PNL (3) ELMS INPUTS WOW CARD ASG CARD AIMS AIMS LOAD SENSOR (4) BPCU RAD ALT (3) ELMS GND TEST ENABLE SW CARD FILES USER SYSTEMS ELMS LEFT AND RIGHT SYSTEMS CARD FILES USER SYSTEMS SYSTEMS ARINC 629...
Page 378 777 TRAINING MANUAL AIR/GROUND SYSTEM -- WOW LOAD SENSOR Purpose and the coils and causes the target to be in the on- ground position. The load sensors measure the load on the main landing gear beams to find when the airplane has weight on The load sensor sends an analog signal to the WOW wheels.
Page 379 777 TRAINING MANUAL MAIN LANDING SPOILER BEAM GEAR BEAM CUTOUT OUTBD SPOILER BEAM MAIN LANDING GEAR BEAM AND SPOILER BEAM LOAD SENSORS (COVER REMOVED) MOUNTING MOUNTING BRACKETS BRACKETS TARGET BELLOWS COILS ELECTRICAL CONNECTOR MAIN LANDING LOAD SENSORS GEAR BEAM LOAD SENSORS INSTALLATION (TOP VIEW) LOAD SENSOR AIR/GROUND SYSTEM - WOW LOAD SENSOR...
Page 380 777 TRAINING MANUAL AIR/GROUND SYSTEM -- WOW CARDS AND AIR/GROUND RELAYS Purpose Two WOW cards get the weight-on-wheels signals from the WOW sensors. The WOW cards then send air/ground data to other airplane systems. The WOW cards also control master air/ground relays in ELMS. Air/ground relays get the signals from the WOW cards and supply air/ground analog signals to other aircraft systems.
Page 381 777 TRAINING MANUAL P85 LEFT SYSTEMS CARD FILE Ñ LEFT WOW CARD P84 RIGHT SYSTEMS CARD FILE Ñ RIGHT WOW CARD INBD INBD MAIN EQUIPMENT CENTER MAIN EQUIPMENT CENTER RIGHT SIDE (LOOKING FORWARD) LEFT SIDE (LOOKING FORWARD) WOW CARD P85 LEFT SYSTEMS CARDFILE (RIGHT CARDFILE SIMILAR) AIR/GROUND SYSTEM - WOW CARDS AND AIR/GROUND RELAYS 32-09-00...
Page 382 777 TRAINING MANUAL AIR/GROUND SYSTEM -- FUNCTIONAL DESCRIPTION Power Supply Air/Ground Relays The systems cardfiles supply 28v dc electrical power to The right WOW card controls master air mode and ground the WOW cards. The left WOW card gets power from mode relays in the P210 and P310 power management battery bus section 2 and the hot battery bus.
Page 383 777 TRAINING MANUAL BAT. BUS SEC 2 OR LEFT RIGHT MAIN BUS CARDFILE POWER SUPPLY CARD HOT BATTERY BUS USER SYSTEMS RIGHT SYSTEMS ARINC 629 CARD BUSES CARDFILE USERS LOAD SENSOR EXCITATION LEFT MLG BEAM LOAD SENSOR 28V DC AIR MODE SLAVE AIR MODE AIR/GND...
Page 384 777 TRAINING MANUAL AIR/GROUND SYSTEM -- INDICATION Maintenance Page The air or ground output from each of the load sensors shows on the landing gear actuation/indication maintenance page. This page shows simulated air or ground conditions with the word SIM adjacent to the AIR or GND indication.
Page 385: Status Display
777 TRAINING MANUAL LANDING GEAR ACTN/INDN AUTO PAGE 2/2 SEMI LEVER GEAR PSEU 1: LSLG PSEU 2: RSLG LOCK NEAR UNLOCK LOCK HYDRAULIC 0.91 0.90 1.00 PRESS 3000 3050 3010 LANDING GEAR ACTN/INDN PAGE 1/2 PSEU 1 PSEU 2 28 V 28 V TAILSTRIKE 100.1...
Page 386 777 TRAINING MANUAL AIR/GROUND SYSTEM -- SYSTEM TESTS General These are the air/ground system tests: LEFT AIR/GROUND SYSTEM RIGHT AIR/GROUND SYSTEM. Air/Ground System Tests There is an air/ground test for each of the air/ground systems. These tests do a check of the functions of the air/ground system components.
Page 387: System Test
777 TRAINING MANUAL Select System Test 32 AIR/GROUND SYSTEM SYSTEM TESTS: GROUND TESTS LEFT AIR/GROUND SYSTEM RIGHT AIR/GROUND SYSTEM Select ATA System (60) Select Test Type 31 AIMS - Flight Data Recorder System SYSTEM 31 Printer TEST 31 AIMS - Airplane Condition Monitoring System 31 AIMS - Left AIMS OPERATIONAL 31 AIMS - Right AIMS...
Page 388 777 TRAINING MANUAL AIR/GROUND SYSTEM -- SPECIAL FUNCTIONS General At least one of the three radio altimeters shows a radio altitude of less than 2 feet. You can control air mode and ground mode simulation through these six special functions on the MAT: To do a simulation of air mode or ground mode to all the airplane systems, you must do the simulation function Left air simulation...
Page 389 777 TRAINING MANUAL Select Function SPECIAL FUNCTIONS LEFT AIR SIMULATION LEFT GROUND SIMULATION LEFT STOP SIMULATION Select ATA System (21) 24 Flight Control DC Power System RIGHT AIR SIMULATION 26 Cargo Smoke Detection System RIGHT GROUND SIMULATION 27 Primary Flight Control System 31 AIMS - DISPLAY SYSTEM 27 High Lift System RIGHT STOP SIMULATION...
Page 390 777 TRAINING MANUAL AIR/GROUND SYSTEM -- AIR/GROUND RIGGING/CALIBRATION General If the airplane weight is on the landing gear, do the ground calibration. After you replace a load sensor, the new sensor must be calibrated to the airplane. You calibrate all four load If the airplane is on jacks, do the air calibration.
Page 391 777 TRAINING MANUAL LINE EXTENDED OTHER OTHER HELP REPORT HELP MAINTENANCE MAINTENANCE FUNCTIONS FUNCTIONS INPUT MONITORING AIR/GROUND RIGGING/CALIBRATION CENTRAL MAINTENANCE SENSOR SENSOR ACTUAL GROUND SENSOR OPTIONS EQUIPMENT FUNCTION ANALOG STATUS ENGINE BALANCING VALUE POINT POINT M32101 Left MLG beam 1450 1100 1250 SHOP FAULTS...
Page 392 777 TRAINING MANUAL STEERING -- INTRODUCTION Purpose ARINC - Aeronautical Radio, Inc. EHSV - electrohydraulic servovalve The nose gear steering (NGS) system and the main gear - first officer steering system (MGSS) supply directional control of LVDT - linear variable differential transformer the airplane on the ground.
Page 393 777 TRAINING MANUAL STEERING - NOSE GEAR STEERING SYSTEM - MAIN GEAR STEERING SYSTEM MGSCU STEERING - INTRODUCTION 32-50-00 - 381 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 394 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- INTRODUCTION Purpose The nose gear steering system supplies the primary ground directional control of the airplane. Inputs Steering inputs are from the steering tillers or the rudder pedals. Cable Loops Steering inputs move an upper cable loop. This loop connects to a lower cable loop.
Page 395 777 TRAINING MANUAL STEERING TILLERS UPPER CABLE LOOP RUDDER PEDAL INPUT LOWER CABLE LOOP NLG STEERING METERING VALVE MODULE CENTER HYDRAULIC SYSTEM PRESSURE NOSE GEAR STEERING SYSTEM - INTRODUCTION 32-51-00 - 383 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 396 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- COMPONENTS Upper Cable Loop Components These are the nose gear steering components on the upper cable loop: NLG steering tiller and gearbox (2) NLG drum mechanism (2) NLG steering centering and rudder interconnect mechanism NLG steering broken cable compensator NLG steering pivot link.
Page 397 777 TRAINING MANUAL UPPER CABLE LOOP NLG STEERING CENTERING AND RUDDER INTERCONNECT MECHANISM FIRST OFFICER'S TILLER/GEARBOX NLG STEERING CENTERING MECHANISM NLG STEERING BROKEN CABLE CAPTAIN'S COMPENSATOR TILLER/GEARBOX NLG DRUM NLG PIVOT LINK MECHANISMS LOWER CABLE NLG STEERING LOOP METERING VALVE MODULE NLG STEERING SUMMING MECHANISM...
Page 398 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING TILLER, GEARBOX, AND DRUM MECHANISM Purpose Training Information Point Two NLG steering tillers control nose gear steering up Zero-position indicators are at the base of each to 70 degrees in each direction. tiller.
Page 399 777 TRAINING MANUAL ZERO POSITION INDICATOR CAPTAIN FIRST OFFICER TILLER TILLER TILLER GEARBOX ASSEMBLY TORQUE SHAFT DRUM NLG STEERING TILLER AND GEARBOX (2) MECHANISMS TORQUE SHAFT INPUT CABLE DRUMS NLG STEERING TILLER POSITION TRANSDUCER UPPER CABLE LOOP DRUM MECHANISM (2) (LOOKING DOWN) NOSE GEAR STEERING SYSTEM - NLG STEERING TILLER, GEARBOX, AND DRUM MECHANISM 32-51-00...
Page 400 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING CENTERING AND RUDDER INTERCONNECT MECHANISM THIS PAGE INTENTIONALLY LEFT BLANK 32-51-00 - 388 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 401 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING CENTERING AND RUDDER INTERCONNECT MECHANISM Purpose A roller attaches to each of the free arm assemblies. The rollers can touch the cable quadrant arm and the The NLG steering centering and rudder interconnect rudder pedal arm.
Page 402 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING CENTERING AND RUDDER INTERCONNECT MECHANISM the two rollers. This causes one of the free arm cable quadrant and quadrant arm. Rudder pedal inputs assemblies to move and pulls on the centering springs. will then cause the centering springs to extend.
Page 403 777 TRAINING MANUAL NLG STEERING PIVOT CENTERING AND POINT INTERCONNECT MECHANISM CENTERING SPRINGS FREE ARM RUDDER ASSEMBLY RUDDER RUDDER SYSTEM PEDAL PEDAL ARM INPUT FORWARD CONTROL COMPONENTS UPPER CABLE LOOP FREE ARM RIG PIN ASSEMBLY HOLES ROLLER FREE ARM ASSEMBLY RUDDER CABLE PEDAL ARM...
Page 404 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING BROKEN CABLE COMPENSATOR Purpose Functional Description The NLG steering broken cable compensator protects the Tension in the upper cable loop pulls on the force steering system from inputs caused by a break in the links.
Page 405 777 TRAINING MANUAL UPPER CABLE LOOP PULLEYS MAIN EQUIPMENT CENTER - LOOKING FORWARD BROKEN CABLE COMPENSATOR (MAIN BATTERY REMOVED) OUTPUT CAM AND SHAFT FRONT PULLEY (REAR PULLEY NOT SHOWN) FORCE LINKS ROLLER NO STEERING INPUT TURN INPUT BROKEN CABLE NOSE GEAR STEERING SYSTEM - NLG STEERING BROKEN CABLE COMPENSATOR 32-51-00 - 393 - ALTEON PROPRIETARY.
Page 406 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING PIVOT LINK AND NLG STEERING CENTERING MECHANISM Purpose Functional Description The NLG steering pivot link connects the upper cable When the nose gear starts to retract, the movement of loop to the lower cable loop. the nose gear lock link moves the spring cartridge.
Page 407 777 TRAINING MANUAL SPRING NLG LOCK CARTRIDGE LINK STEERING PIVOT LINK DRUM CRANK CAM FOLLOWER CAM ASSEMBLY GUIDE LINK SHAFT DRIVER SHOCK STRUT STEERING PIVOT LINK NLG STEERING CENTERING MECHANISM (COVER REMOVED) NOSE GEAR STEERING SYSTEM - NLG STEERING PIVOT LINK AND NLG STEERING CENTERING MECHANISM 32-51-00 - 395 - ALTEON PROPRIETARY.
Page 408 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING SUMMING MECHANISM AND METERING VALVE MODULE THIS PAGE INTENTIONALLY LEFT BLANK 32-51-00 - 396 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 409 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING SUMMING MECHANISM AND METERING VALVE MODULE General NLG Steering Metering Valve Module The NLG steering summing mechanism adds steering tiller The NLG steering metering valve module contains these input and nose gear position feedback to control the components: NLG steering metering valve module.
Page 410 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING SUMMING MECHANISM AND METERING VALVE MODULE towing. A towing lever pin holds the towing lever in the TOW position. The swivel valves control hydraulic flow to the two sides of the steering actuators. Functional Description Tiller operation moves the summing mechanism from the neutral position.
Page 411 777 TRAINING MANUAL COMPENSATOR LOWER CABLE DYNAMIC LOOP LOAD METERING VALVE DAMPER MODULE PROTECTIVE COVER PULLEY SWIVEL VALVES SUMMING LEVER INPUT ROD TOWING LEVER PIVOT POINT TOWING LEVER PULLEY UPPER STEERING PLATE NLG STEERING SUMMING MECHANISM (PROTECTIVE COVER REMOVED) (TOP VIEW) NOSE LANDING GEAR NOSE GEAR STEERING SYSTEM - NLG STEERING SUMMING MECHANISM AND METERING VALVE MODULE 32-51-00...
Page 412 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- NLG STEERING ACTUATORS AND NOSEWHEEL STEERING COLLAR Purpose The NLG steering actuators supply the force to turn the nose gear. The nosewheel steering collar transmits the actuator steering forces to the nose gear. Steering Actuators The NLG steering actuators are trunnion-mounted between the upper and lower steering plates.
Page 413 777 TRAINING MANUAL QUICK DISCONNECT FITTING NLG STEERING ACTUATORS TORSION LINKS NLG STEERING ACTUATOR STEERING PLATES NOSEWHEEL STEERING COLLAR NOSE GEAR STEERING SYSTEM - NLG STEERING ACTUATORS AND NOSEWHEEL STEERING COLLAR 32-51-00 - 401 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 414 777 TRAINING MANUAL NOSE GEAR STEERING SYSTEM -- FUNCTIONAL DESCRIPTION General Feedback The NGS system uses center hydraulic system pressure to When the nose gear gets to the commanded position, the turn the nose gear. summing mechanism moves the metering valve back to neutral.
Page 415 777 TRAINING MANUAL TOWING BYPASS S/O VALVE VALVE COMPENSATOR LEFT RIGHT FROM SUMMING LEVER METERING VALVE DYNAMIC LOAD DAMPER LEFT RIGHT STRG ACT STRG ACT LEFT SWIVEL RIGHT SWIVEL PRESSURE VALVE VALVE RETURN MECHANICAL NOSE GEAR STEERING SYSTEM - FUNCTIONAL DESCRIPTION 32-51-00 - 403 - ALTEON PROPRIETARY.
Page 416 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- INTRODUCTION Purpose to calculate the CONFIG GEAR STEERING takeoff configuration warning. The main gear steering system reduces tire scrub and airplane turn radius. Main gear steering also decreases the force necessary to turn the airplane. Components The main gear steering system components include: NLG steering tiller position transducer (2)
Page 417 777 TRAINING MANUAL MG STEERING CRANK NLG STEERING MG STEERING TILLER MLG STEERING/ REACTION LINK POSITION LOCKING PCA TRANSDUCERS MAIN GEAR TRUCK (2) AIMS LEFT SYSTEM ARINC 629 BUS WARNING ELECTRONIC SYSTEM MGSCU (E6) MAIN GEAR STEERING SYSTEM - INTRODUCTION 32-53-00 - 405 - ALTEON PROPRIETARY.
Page 418 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- NLG STEERING TILLER POSITION TRANSDUCERS Purpose Two NLG steering tiller position transducers supply steering tiller data to the MGSCU. The MGSCU uses this data to control the main gear steering. Physical Description The two NLG steering tiller position transducers are the same.
Page 419 777 TRAINING MANUAL TORQUE SHAFT NOSE WHEEL TILLER POSITION INPUT SHAFT TRANSDUCERS STEERING TILLER DRUM MECHANISM MOUNTING SCREWS ELECTRICAL CONNECTOR NLG STEERING TILLER POSITION TRANSDUCER MAIN GEAR STEERING SYSTEM - NLG STEERING TILLER POSITION TRANSDUCERS 32-53-00 - 407 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 420: Control Unit
777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- MAIN GEAR STEERING CONTROL UNIT Purpose The MGSCU gets the steering inputs from the nosegear steering tiller position transducers and controls the main gear steering/locking power control actuators. The MGSCU also monitors the main gear steering system for faults.
Page 421 777 TRAINING MANUAL E6-3 SHELF - MAIN GEAR STEERING CONTROL UNIT MGSCU AFT CARGO COMPARTMENT MAIN GEAR STEERING SYSTEM - MAIN GEAR STEERING CONTROL UNIT 32-53-00 - 409 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 422 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- MAIN GEAR TRUCK COMPONENTS THIS PAGE INTENTIONALLY LEFT BLANK 32-53-00 - 410 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 423: Training Manual
777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- MAIN GEAR TRUCK COMPONENTS General Reaction Link These components are on the aft part of each main gear A reaction link transmits steering forces back to the truck assembly: steering crank. This link connects the left side of the aft axle to the steering crank.
Page 424 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- MAIN GEAR TRUCK COMPONENTS WARNING: MAKE SURE THE MAIN LANDING GEAR STEERING SYSTEM IS ISOLATED FROM HYDRAULIC POWER BEFORE YOU DO WORK NEAR THE TIRES, WHEELS, OR BRAKES. IF YOU DO NOT DO THIS, THE AFT AXLES CAN AUTOMATICALLY TURN.
Page 425 777 TRAINING MANUAL STEERING CRANK REACTION LINK BALL-LOCK MANUAL SHUTOFF VALVE HANDLE MLG TRUCK (LEFT AFT WHEEL REMOVED) ANTI-CAVITATION CHECK VALVES MANUAL SHUTOFF VALVE HANDLE LOCK INDICATION PRESSURE PORT WINDOW ISOLATION/POWER CENTERING VALVE PROTECTIVE COVER LOCK POSITION Ñ ARMING SOLENOID LVDT Ñ...
Page 426 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- ELECTRIC FUNCTIONAL DESCRIPTION General The steering control law sends signals to the EHSVs for the two PCAs to turn the main gear in proportion to the The MGSCU gets the inputs from the NLG steering tiller nose gear position.
Page 427 777 TRAINING MANUAL 28V DC LEFT MAIN BUS LOCK ARM SOLENOID RIGHT PCA UNLK UNLK CONTROL MAIN GEAR STEERING ARM/UNLOCK LOGIC UNLOCK P110 LEFT POWER MGMT SOLENOID LEFT AFT AXLE PANEL TURN ANGLE LEFT PCA ELECTRO- CONTROL HYDRAULIC SERVO VALVE CAPTAINS NOSE GEAR ANGLE TILLER POS XDCR...
Page 428 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- HYDRAULIC FUNCTIONAL DESCRIPTION General Control The MGSCU gets input from the two NLG steering tiller The MGSCU sends signals to the EHSV to extend or position transducers and sends signals to the retract the actuator.
Page 429 777 TRAINING MANUAL MANUAL S/O VALVE SOL VLV EHSV COMPENSATOR ISOLATION/POWER CENTERING VALVE UNLOCK TO LEFT NOSE WHEEL SOLENOID AND RIGHT TILLER VALVE STRG/LOCKING POSITION TRANSDUCER ACT POS PRESSURE LVDT RETURN UNLK LVDT METERED MGSCU STEERING/LOCKING POWER CONTROL ACTUATOR (TYPICAL) PRESSURE MAIN GEAR STEERING SYSTEM - HYDRAULIC FUNCTIONAL DESCRIPTION 32-53-00...
Page 430 777 TRAINING MANUAL MAIN GEAR STEERING SYSTEM -- INDICATIONS Alert and Status Messages The CONFIG GEAR STEERING warning message shows when a steering/locking PCA is not locked during takeoff. The MAIN GEAR STEERING advisory message shows if a steering/locking PCA gets a lock command and is not locked.
Page 431 777 TRAINING MANUAL LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS CONFIG GEAR STEERING L TILLER MAIN GEAR STEERING R TILLER MAIN GEAR LEFT RIGHT BRAKE TEMP EICAS DISPLAY TIRE PRESS AFT AXLE AFT AXLE 6.5R UNLOCKED LOCKED DISABLED BRAKE METERED PRESS MAIN GEAR STEERING 3000...
Page 432 777 TRAINING MANUAL WHEELS AND BRAKES -- INTRODUCTION THIS PAGE INTENTIONALLY LEFT BLANK 32-40-00 - 420 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 433 777 TRAINING MANUAL WHEELS AND BRAKES -- INTRODUCTION General - direct current decel - deceleration The wheels and brakes system includes: - feet - forward Wheels, brakes, and tires (32-45) - ground Brake hydro-mechanical control system (32-41) - gear Parking brake system (32-44) Antiskid/autobrake systems (32-42) - hydraulic Brake temperature monitor system (BTMS) (32-46)
Page 434 777 TRAINING MANUAL WHEELS AND BRAKES -- INTRODUCTION - second - selector - signal - solenoid - speed stby - standby strg - steering - switch - system temp - temperature - valve - wheel - wheel interface unit xdcr - transducer.
Page 435: Parking Brake System
777 TRAINING MANUAL WHEELS AND BRAKES 13 14 WHEELS, BRAKES, AND TIRES BRAKE HYDRO-MECHANICAL CONTROL SYSTEM PARKING BRAKE SYSTEM ANTISKID/AUTOBRAKE SYSTEMS BRAKE TEMPERATURE MONITOR SYSTEM TIRE PRESSURE INDICATION SYSTEM WHEELS, TIRES, AND BRAKES NUMBERING SYSTEM WHEELS AND BRAKES - INTRODUCTION 32-40-00 - 423 - ALTEON PROPRIETARY.
Page 436 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- INTRODUCTION Main Landing Gear Each main landing gear has a six-wheel truck. A brake assembly is in each of the 12 main landing gear wheel and tire assemblies. Nose Landing Gear The nose landing gear has two wheel and tire assemblies.
Page 437 777 TRAINING MANUAL MLG WHEEL AND TIRE ASSEMBLY (6) BRAKE NLG WHEEL AND TIRE ASSEMBLY INBD NOSE WHEEL SPIN BRAKES MAIN LANDING GEAR TRUCK (2) NOSE LANDING GEAR NOSE LANDING GEAR WHEEL WELL (LOOKING FORWARD) WHEELS, BRAKES, AND TIRES - INTRODUCTION 32-45-00 - 425 - ALTEON PROPRIETARY.
Page 438 777 TRAINING MANUAL WHEELS, BRAKES AND TIRES -- NOSE LANDING GEAR WHEEL AND TIRE Nose Landing Gear Wheels The nose landing gear wheels can operate with one wheel tie bolt broken or gone. The nose wheels have 43 X 17.5R17 radial tires. They have forged inner and outer wheel halves.
Page 439 777 TRAINING MANUAL OVER-PRESSURE RELIEF VALVE WHEEL TIE BOLTS INNER WHEEL HALF TIRE OUTER INFLATION WHEEL VALVE HALF WHEELS, BRAKES AND TIRES - NOSE LANDING GEAR WHEEL AND TIRE 32-45-00 - 427 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 440 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- NOSE WHEEL SPIN BRAKE Purpose Two nose wheel spin brakes use friction with the nose gear tires to stop nose wheel movement after the nose gear goes in the wheel well. Physical Description The wheel spin brake assemblies are on a tube in the upper forward nose wheel well.
Page 441 777 TRAINING MANUAL NLG DOOR SAFETY VALVE (REF) NOSE WHEEL SPIN BRAKES NOSE WHEEL WELL (LOOKING FORWARD) NLG DOOR ACTUATOR (REF) CLEATS WHEELS, BRAKES, AND TIRES - NOSE WHEEL SPIN BRAKE 32-45-00 - 429 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 442 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- MAIN LANDING GEAR WHEEL AND TIRE Main Landing Gear Wheels Thermal Fuse Plugs The main wheels are radial tire wheels (52X21R22). They Three thermal fuse plugs in the inner wheel half have forged inner and outer halves. Tie bolts hold the prevent a tire explosion caused by hot brakes.
Page 443 777 TRAINING MANUAL OVER-PRESSURE RELIEF VALVE TIRE INFLATION VALVE TIRE PRESSURE INBD SENSOR DRIVE KEYS WHEEL TIE BOLTS HEAT SHIELDS OUTER WHEEL HALF THERMAL FUSE PLUG (3) INNER WHEEL HALF WHEELS, BRAKES, AND TIRES - MAIN LANDING GEAR WHEEL AND TIRE 32-45-00 - 431 - ALTEON PROPRIETARY.
Page 444 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- MAIN LANDING GEAR WHEEL BRAKES THIS PAGE INTENTIONALLY LEFT BLANK 32-45-00 - 432 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 445 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- MAIN LANDING GEAR WHEEL BRAKES General The brake units are on bushings that are on replaceable landing gear axle sleeves. The main landing gear wheel brakes use hydraulic pressure to decrease the speed of or stop the airplane The center brake attachment points connect directly to during landing and taxi.
Page 446 777 TRAINING MANUAL WHEELS, BRAKES, AND TIRES -- MAIN LANDING GEAR WHEEL BRAKES If you remove a brake assembly from a front or rear axle for dispatch, you must replace it with a center brake. This keeps the brake rods in position. If you do a deactivation of a brake, you must do the Antiskid Indications Disable function in Special Functions on the MAT to remove the ANTISKID advisory...
Page 447 777 TRAINING MANUAL BRAKE (6) ROTORS END PLATE ASSEMBLY SELF-ADJUSTING STATORS PISTON (7) INBD BRAKE ROD (4) CENTER BRAKE ATTACHMENT AXLE POINT BUSHING (2) INDICATOR PRESSURE WEAR REMAINING PLATE (BRAKES APPLIED) PRESSURE ATTACHMENT PLATE POINT WEAR INDICATOR PIN (2) WHEELS, BRAKES, AND TIRES - MAIN LANDING GEAR WHEEL BRAKES 32-45-00 - 435 - ALTEON PROPRIETARY.
Page 448 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- INTRODUCTION Mechanical Input valves. Gear retract braking operates when the landing gear lever moves to the UP position. An input from the Two sets of brake pedals give full and differential proximity switch electronics unit disables the brake capability.
Page 449 777 TRAINING MANUAL ALT A/S VALVES GEAR UP LINE PRESSURE (RETRACT BRAKING) AUTOBRAKE ANTISKID SHUTTLE NORMAL A/S BRAKES ALTN BMV NORMAL BMV SHUTTLE MODULE VALVES VALVES RIGHT PEDALS ANISKID TRANSDUCER R HYD BRAKE AUTOBRAKE SYSTEM & R HYD VALVE CONTROL PARK ASSV MODULE...
Page 450 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- FLIGHT COMPARTMENT COMPONENTS Flight Compartment Components The hydro-mechanical control system includes these components on or near the flight compartment: Brake pedal bus mechanism Brake cables Brake accumulator pressure gage Brake source light. Brake Pedal Bus Mechanism Most of the brake pedal bus mechanism components are below the flight compartment floor.
Page 451 777 TRAINING MANUAL BRAKE CABLES P1 LEFT FORWARD PANEL BRAKE CABLES BRAKE SOURCE LIGHT BRAKE PEDAL BUS MECHANISM BRAKE SOURCE BRAKE ACCUMULATOR PRESSURE INDICATOR ACCM PRESS PSIX1000 BRAKE ACCUMULATOR PRESSURE INDICATOR PANEL BRAKE HYDRO-MECHANICAL CONTROL - FLIGHT COMPARTMENT COMPONENTS 32-41-00 - 439 - ALTEON PROPRIETARY.
Page 452 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- MAIN LANDING GEAR WHEEL WELL COMPONENTS THIS PAGE INTENTIONALLY LEFT BLANK 32-41-00 - 440 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 453 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- MAIN LANDING GEAR WHEEL WELL COMPONENTS Main Landing Gear Wheel Well Components Brake Accumulator The hydro-mechanical control system includes these The brake accumulator is on the keel beam in the right components in or near the left and right main landing main landing gear wheel well.
Page 454 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- MAIN LANDING GEAR WHEEL WELL COMPONENTS Antiskid Surge Accumulator Servicing Components Antiskid surge accumulator servicing components are on the left main landing gear beam outboard of the antiskid surge accumulator. 32-41-00 - 442 - ALTEON PROPRIETARY.
Page 455 777 TRAINING MANUAL BRAKE SOURCE PRESSURE SWITCH BRAKE METERING VALVE BRAKE SOURCE PRESSURE SWITCH BRAKE BRAKE METERING ACCUMULATOR VALVE ALTERNATE SOURCE SELECTOR VALVE ACCUMULATOR ISOLATION VALVE BRAKE ACCUMULATOR SERVICING COMPONENTS LEFT MAIN LANDING GEAR WHEEL WELL RIGHT MAIN LANDING GEAR WHEEL WELL MAIN LANDING GEAR BEAM ANTISKID SURGE...
Page 456 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE PEDAL BUS MECHANISM Purpose Pedal operation goes through vertical control rods to the lower bellcranks. These bellcranks connect to brake The brake pedal bus mechanism sends brake pedal inputs pedal bus crank assemblies and cable quadrants with to manually control brake system pressure.
Page 457 777 TRAINING MANUAL FIRST OFFICER PARKING BRAKE RUDDER PEDALS LEVER (REF) RIGHT BRAKE CABLES VERTICAL CAPTAIN CONTROL ROD (4) RUDDER PEDALS LOWER BELLCRANK (4) FORE-AFT CONTROL ROD (4) CABLE QUADRANT (2) LEFT BRAKE CABLES TRANSVERSE CONTROL ROD (2) BRAKE PEDAL BUS CRANK ASSEMBLY (2) BRAKE HYDRO-MECHANICAL CONTROL - BRAKE PEDAL BUS MECHANISM 32-41-00...
Page 458 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE METERING VALVE ASSEMBLY - GENERAL DESCRIPTION Purpose make small adjustments with the pushrod in the actuation/support assembly. The brake metering valve assemblies get brake pedal input and control brake pressure. Components Each brake metering valve assembly includes these components: Brake metering valve actuation/support assembly Normal brake metering valve...
Page 459 777 TRAINING MANUAL BRAKE CABLES NORMAL BRAKE METERING VALVE BRAKE METERING VALVE ACTUATION/SUPPORT ALTERNATE BRAKE METERING VALVE ASSEMBLY PUSHROD RIGHT BRAKE METERING VALVE ASSEMBLY (LEFT ASSEMBLY SIMILAR) RIGHT MAIN LANDING GEAR WHEEL WELL BRAKE HYDRO-MECHANICAL CONTROL - BRAKE METERING VALVE ASSEMBLY - GENERAL DESCRIPTION 32-41-00 - 447 - ALTEON PROPRIETARY.
Page 460 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE METERING VALVE ASSEMBLY - FUNCTIONAL DESCRIPTION General The metering valve spools are spring-loaded to the brakes OFF position. On the brake metering valve assembly, the normal and alternate brake metering valves are almost the same. Metering valve spool movement sends pressure to the They attach together with bolts and use the same input brakes and to the feedback chamber.
Page 461 777 TRAINING MANUAL INPUT METERING FEEDBACK BRAKE RETRACT SRING SPOOL CHAMBER RELEASED RETURN BRAKING ACTUATOR GEAR RETRACT BRAKING PRESSURE OUTER FEEDBACK PISTON SYSTEM BRAKE INPUT INNER PRESS PRESS CRANK FEEDBACK PISTON BRAKE INITIALLY INPUT APPLIED RETURN CRANK ALTERNATE BRAKE METERING VALVE NORMAL METERING VALVE...
Page 462 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE ACCUMULATOR AND SERVICING COMPONENTS THIS PAGE INTENTIONALLY LEFT BLANK 32-41-00 - 450 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 463 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE ACCUMULATOR AND SERVICING COMPONENTS General inches. The right hydraulic system pressurizes the accumulator. The brake accumulator supplies brake pressure to the normal brake hydraulic system when the center and right The brake accumulator pressure transducer sends the hydraulic systems are off.
Page 464 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE ACCUMULATOR AND SERVICING COMPONENTS WARNING: DO NOT LOOSEN THE BODY OF THE BRAKE ACCUMULATOR CHARGING VALVE. THE PRESSURE IN THE BRAKE ACCUMULATOR CAN QUICKLY PUSH THE CHARGING VALVE OFF THE MANIFOLD. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
Page 465 777 TRAINING MANUAL PRESSURE BRAKE SOURCE INDICATOR CHARGING INSTRUCTIONS- ACCM HYDRAULIC ACCUMULATOR. PRESS PSIX1000 WITH SYSTEM DEPRESSURIZED, CHARGE WITH DRY NITROGEN TO APPLICABLE PRESSURE PER CHART BELOW |100 PSI BRAKE ACCUMULATOR PRESSURE 1200 INDICATOR PANEL (P1) 1100 1000 RIGHT MAIN LANDING GEAR WHEEL WELL BRAKE ACCUMULATOR...
Page 466 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- ANTISKID SURGE ACCUMULATOR AND SERVICING COMPONENTS Purpose Training Information Point The anti-skid surge accumulator absorbs brake release An antiskid surge accumulator is not necessary for the surges from the left normal anti-skid valve module. right normal antiskid valve module since the right hydraulic system reservoir is very near to the right Components...
Page 467 777 TRAINING MANUAL TRUNNION INBD DOOR INBD LEFT MAIN LANDING GEAR TRUNNION DOOR LEFT NORMAL CHARGING ANTI-SKID VALVE AND VALVE MODULE PRESSURE ACCESS (REF) GAGE PANEL PLACARD LEFT MAIN LANDING GEAR BEAM ANTI-SKID SURGE ACCUMULATOR INBD LEFT ANTI-SKID SHUTTLE VALVE MODULE (REF) LEFT MAIN LANDING GEAR BEAM BRAKE HYDRO-MECHANICAL CONTROL - ANTISKID SURGE ACCUMULATOR AND SERVICING COMPONENTS...
Page 468 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- ALTERNATE SOURCE SELECTOR AND ACCUMULATOR ISOLATION VALVES Purpose These two hydro-mechanical valves select and send pressure to the normal or the alternate brake hydraulic systems: Alternate source selector valve (ASSV) Accumulator isolation valve (AIV). Location The ASSV is on the keel beam in the left main landing gear wheel well.
Page 469 777 TRAINING MANUAL ALTERNATE BRAKE HYDRAULIC SYSTEM PRESSURE SWITCH TO ALTERNATE CTR HYD SYS BRAKE SYSTEM FUSE ASSEMBLY ALTN BRAKE TO ALTN SOURCE SYS PRESS SELECTOR VALVE RETURN/ RETRACT PRESSURE TO ACCUMULATOR ISOLATION VALVE RT HYD SYS RT HYD SYS TO NORMAL BRAKE SYS ALTERNATE SOURCE SELECTOR VALVE (ASSV)
Page 470 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE SOURCE SELECTOR VALVES - FUNCTIONAL DESCRIPTION General Brake Accumulator Isolation Valve (AIV) The alternate source selector valve and the accumulator Center hydraulic system pressure downstream of the ASSV isolation valve operate together to control pressure to is the control pressure for the AIV.
Page 471 777 TRAINING MANUAL LANDING GEAR RETRACT PRESSURE (ASSV ONLY) TO BRAKE METERING VALVES SLIDE CONTROL SLEEVE PISTON CONTROL PRESSURE PRESSURE SOURCE SOURCE SELECTOR VALVE RIGHT HYDRAULIC (TYPICAL) SYSTEM/BRAKE ACCUMULATOR PRESSURE LANDING CENTER/RESERVE GEAR RETRACT HYDRAULIC PRESSURE SYSTEM PRESSURE ALTERNATE BRAKE RIGHT HYDRAULIC SYSTEM PRESSURE SYSTEM PRESSURE...
Page 472 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- BRAKE SOURCE PRESSURE SWITCHES Purpose These two brake source pressure switches control the brake source light and send pressure signals to the BSCU and AIMS for brake control and indication: The normal brake hydraulic system pressure switch The alternate brake hydraulic system pressure switch.
Page 473 777 TRAINING MANUAL BRAKE SOURCE LIGHT BRAKE SOURCE ACCM PRESS PSIX1000 BRAKE ACCUMULATOR PRESS IND PNL (P1) NORMAL BRAKE HYDRAULIC SYSTEM PRESSURE SWITCH ALTERNATE BRAKE HYDRAULIC SYSTEM PRESSURE SWITCH BRAKE ACCUMULATOR (REF) ALTERNATE SOURCE SELECTOR VALVE RIGHT MAIN LANDING GEAR WHEEL WELL (LEFT MAIN LANDING GEAR WHEEL WELL) BRAKE HYDRO-MECHANICAL CONTROL - BRAKE SOURCE PRESSURE SWITCHES 32-41-00...
Page 474 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-41-00 - 462 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 475: Training Manual
777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- FUNCTIONAL DESCRIPTION General Alternate Brakes The source selection operation supplies pressure for: When right hydraulic system pressure is low, center hydraulic system pressure operates the ASSV. The ASSV Normal brakes sends center hydraulic system pressure to the alternate Alternate brakes brake system.
Page 476 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- FUNCTIONAL DESCRIPTION braking actuators on the alternate brake metering valves to pressurize the brakes. 32-41-00 - 464 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 477 777 TRAINING MANUAL CENTER/RESERVE RIGHT HYDRAULIC ACMP HYDRAULIC SYSTEM SYSTEM RESERVE FLUID NORMAL BRAKE HYD SYS PRESS SWITCH RESERVE ACMP ACMP ISOLATION VALVE GEAR RETRACT OTHER NOSE GEAR PRESSURE LOADS BRAKE ISOLATION ACCUMULATOR VALVE ACCUMULATOR ISOLATION ALTERNATE SOURCE VALVE SELECTOR VALVE ALTN BRAKE HYD SYS PRESS NORMAL BRAKE METERING VALVES...
Page 478 777 TRAINING MANUAL BRAKE HYDRO-MECHANICAL CONTROL -- INDICATION General Training Information Point The brake source light and advisory message show when The towing power system can supply power to the brake the normal and the alternate brake system pressures are accumulator pressure indicator and the brake source low.
Page 479 777 TRAINING MANUAL AIMS BSCU NORMAL BRAKE HYD SYS PRESS SWITCH (RT MLG WHEEL WELL) BRAKE SOURCE ACCM 4 PRESS BRAKE PS1X1000 SOURCE MD&T ALTN BRAKE HYD BRAKE SOURCE LIGHT SYS PRESS SWITCH (LT MLG WHEEL WELL) 28V DC BAT. BUS SEC 2 LG BRAKE PRESSURE IND...
Page 480 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- INTRODUCTION Purpose The parking brake system uses the available brake pressure to keep the main landing gear brakes applied when the airplane is parked. Brake status lights on the nose landing gear and the PARKING BRAKE SET memo message show the condition of the parking brake system.
Page 481 777 TRAINING MANUAL SIDE INBD INBD SIDE LANDING LIGHTS (REF) DOWN NOSE ARMED DOWN FLAP ALTN BRAKE-ON LIGHT BRAKE-OFF ALTN FLAPS PARKING NOSE DN NOSE DN (RED) LIGHT BRAKE NOSE PULL (BLUE) PARKING FUEL CONTROL STAB BRAKE-SET PARKING TAXI LIGHTS NORM LIGHT BRAKE...
Page 482 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- GENERAL DESCRIPTION Components Training Information Point These are the parking brake system components: A fully charged (3000 psig) brake accumulator keeps the brakes pressurized for at least eight hours. Parking brake lever Parking brake latch mechanism Parking brake latch switch (2) Parking brake valve Pedal position switch (2)
Page 483 777 TRAINING MANUAL BRAKE STATUS MECHANICAL PEDAL POSITION INDICATION CONNECTION SWITCH (2) LIGHT (3) ELECTRICAL RIGHT HYDRAULIC CONNECTION SYSTEM PRESSURE PRESSURE (SYSTEM) PRESSURE BRAKE (METERED) ACCUMULATOR RETURN BRAKE PEDALS NORMAL BRAKE NORMAL BRAKE AUTOBRAKE METERING VALVE METERING VALVE VALVE MODULE PARKING BRAKE PARKING BRAKE BRAKE METERED...
Page 484 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- COMPONENT LOCATIONS General The parking brake lever is on the left side of the P10 control stand. The parking brake latch mechanism is under the flight compartment floor below the captain rudder pedals. Two parking brake latch switches are on the latch mechanism.
Page 485 777 TRAINING MANUAL PARKING BRAKE SIDE INBD INBD SIDE LEVER DOWN NOSE DOWN ARMED FLAP ALTN ALTN FLAPS PARKING NOSE DN NOSE DN BRAKE NOSE PULL FUEL CONTROL STAB PARKING NORM BRAKE CUTOUT CUTOFF NOSE UP NOSE UP LEVER PARKING BRAKE P10 CONTROL STAND LATCH SWITCHES...
Page 486 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- PARKING BRAKE LEVER Purpose The parking brake lever mechanically moves the brake latch mechanism to lock the brakes in the applied position. Location The parking brake lever is aft of the cursor control device on the left side of the P10 control stand.
Page 487: Parking Brake Lever
777 TRAINING MANUAL SIDE INBD INBD SIDE DOWN NOSE DOWN ARMED FLAP ALTN PARKING BRAKE ALTN FLAPS PARKING NOSE DN NOSE DN BRAKE NOSE LEVER PULL PARKING FUEL CONTROL STAB BRAKE NORM LEVER CUTOUT CUTOFF NOSE UP NOSE UP P10 CONTROL STAND PARKING BRAKE PEDAL MECHANISM PARKING BRAKE SYSTEM - PARKING BRAKE LEVER...
Page 488 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- PARKING BRAKE LATCH MECHANISM AND LATCH AND PEDAL POSITION SWITCHES Purpose the applied position. The pawls engage stops on the captain's left and right brake lower bellcranks. The parking brake latch mechanism mechanically locks the brake pedals in the applied position.
Page 489 777 TRAINING MANUAL LATCH SPRING VERTICAL CONTROL PARKING ROD (2) (REF) BRAKE LEVER PARKING VERTICAL CONTROL BRAKE LATCH ROD (2) (REF) SWITCH (2) PARKING BRAKE LATCH MECHANISM BRAKE PEDAL CABLE QUADRANT TRANSVERSE CONTROL ROD (2) (REF) FORE-AFT CAPTAIN'S BRAKE PEDAL LINKAGE CONTROL ROD (2) (REF) TRANSVERSE...
Page 490 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- BRAKE METERED PRESSURE SWITCHES Purpose The brake metered pressure switches control the brake- on light when the airplane is on the ground. Location The right brake metered pressure switch is on the forward wall of the right main landing gear wheel well below the right autobrake shuttle and brake metering valves.
Page 491 777 TRAINING MANUAL RIGHT BRAKE METERING VALVE (REF) RIGHT AUTOBRAKE SHUTTLE VALVE (REF) RIGHT MAIN GEAR WHEEL WELL (LEFT SIMILAR) RIGHT BRAKE METERED PRESSURE SWITCH (LEFT SIMILAR) PARKING BRAKE SYSTEM - BRAKE METERED PRESSURE SWITCHES 32-44-00 - 479 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 492 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- PARKING BRAKE VALVE Purpose The parking brake valve closes to prevent brake accumulator pressure leakage through the normal antiskid valve modules. Location The parking brake valve is on the right main landing gear beam outboard of the right main gear trunnion. It is outboard and aft of the normal antiskid shuttle valve module.
Page 493 777 TRAINING MANUAL ANTISKID SHUTTLE VALVE MODULE (REF) RT HYD SYS BRAKE ACCUMULATOR PARKING BRAKE VALVE (LOOKING AFT) NORMAL BRAKE NORMAL BRAKE METERING VALVE METERING VALVE AUTOBRAKE VALVE MODULE BRAKE METERED BRAKE METERED MANUAL PRESS SW PRESS SW OVERRIDE LEGEND LEVER NORMAL ANTISKID NORMAL ANTISKID...
Page 494 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- BRAKE STATUS INDICATION LIGHTS General Parking Brake Set Light Three brake status lights show people on the ground the The parking brake set light shows when the parking condition of the brakes. brake valve is in the closed position. These are the three brake status indication lights: Brake-off light Brake-on light...
Page 495 777 TRAINING MANUAL BRAKE ON LIGHT (RED) PARKING BRAKE BRAKE OFF LIGHT SET LIGHT (BLUE) (AMBER) NOSE LANDING GEAR (LOOKING AFT) PARKING BRAKE SYSTEM - BRAKE STATUS INDICATION LIGHTS 32-44-00 - 483 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 496 777 TRAINING MANUAL PARKING BRAKE -- FUNCTIONAL DESCRIPTION - CONTROL AND PARKING BRAKE-SET LIGHT INDICATION General When the parking brake lever is set, one parking brake latch switch sends hot battery bus power to close the parking brake valve. The BSCU also monitors lever position through this switch.
Page 497 777 TRAINING MANUAL 28V DC LEVER SET VALVE NOT HOT BAT. CLOSE CLOSED LDG GEAR CLOSE FULLY CLOSED PARKING BRAKE NOT CLOSED VALVE BRUSHLESS RELEASED P11 OVERHEAD CB PANEL MOTOR OPEN PARKING BRAKE LATCH SWITCH VALVE CLOSED NOT OPEN FULLY OPEN PARKING BRAKE LEVER SET VALVE CLOSE...
Page 498 777 TRAINING MANUAL PARKING BRAKE SYSTEM -- FUNCTIONAL DESCRIPTION - BRAKE-OFF AND BRAKE-ON LIGHT INDICATION Brake-Off light Indication The brake-off light turns on when the airplane is on the ground and the left and right pedal position switches are in the brakes not-applied position. Brake-On Light Indication The brake-on light turns on when the airplane is on the ground and the left and right brake metered pressure...
Page 499 777 TRAINING MANUAL BRAKES BRAKES APPLIED APPLIED 28V DC GROUND CAPT FLT BRAKES NOT INST BUS BRAKES NOT APPLIED APPLIED LG BRAKE STATUS IND BRAKE-OFF LEFT PEDAL RIGHT PEDAL LIGHT POSITION SWITCH POSITION SWITCH AIR/GROUND RELAY P310 STANDBY PWR MGMT PANEL PRESSURE PRESSURE 1900...
Page 500 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- INTRODUCTION Purpose The antiskid/autobrake system automatically controls brake metered pressure. Antiskid System The antiskid system monitors wheel speed deceleration and controls brake pressure to prevent skid conditions. It also releases one third of the brakes during taxi to extend the brake service life.
Page 501 777 TRAINING MANUAL ANTISKID SYSTEM AUTOBRAKE SYSTEM SKID CONTROL LOCKED WHEEL PROTECTION LANDING BRAKE CONTROL HYDROPLANE/TOUCHDOWN PROTECTION REJECTED TAKEOFF (RTO) GEAR RETRACT INHIBIT TAXI BRAKE RELEASE ANTISKID/AUTOBRAKE SYSTEM - INTRODUCTION 32-42-00 - 489 - ALTEON PROPRIETARY. Copyright. See title page for details...
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777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- GENERAL DESCRIPTION General Truck tilt (PSEUs) Landing gear lever position (PSEUs) The antiskid system puts a limit on metered brake Air and inertial data (ADIRU) pressure from the hydro-mechanical or the autobrake Speedbrake lever position (PFCs) systems to prevent wheel skid.
Page 504 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- GENERAL DESCRIPTION Alternate Antiskid Operation The alternate brake metering valves send metered pressure from the center hydraulic system to the alternate antiskid valve modules. The BSCU sends signals to the alternate antiskid valve modules to control the metered pressure to each aft brake and to forward-middle brake pairs.
Page 505 777 TRAINING MANUAL CENTER TRUCK TILT (PSEU) RIGHT HYD SYS/ LG LVR POS (PSEU) HYD SYS ACCUMULATOR AIR/INERTIAL DATA (ADIRU) SPEED BRK LVR POS (PFC) THRUST LEVER POS PARKING BRK VALVE POS PARKING BRK LEVER POS ALTN BRAKE NORM BRAKE AUTOBRAKE RT HYD SYS PRESS METERING...
Page 506 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- COMPONENT LOCATIONS THIS PAGE INTENTIONALLY LEFT BLANK 32-42-00 - 494 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 507 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- COMPONENT LOCATIONS General Normal Brake Metered Pressure Transducer These are the antiskid/autobrake system components: The normal brake metered pressure transducers are on the autobrake shuttle valves in the left and right main Autobrake selector wheel wells.
Page 508 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- COMPONENT LOCATIONS Alternate Brake Metered Pressure Transducer The alternate brake metered pressure transducers are on the landing gear beams inboard of the alternate antiskid valves. 32-42-00 - 496 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 509 777 TRAINING MANUAL GND PROX FLAP GEAR INHIBIT OVRD OVRD OVRD OVRD PROX INHB RETRACT TERR 270K-.82M OVRD LOCK OVRD OVRD BSCU ALTN GEAR NORM AUTOBRAKE DOWN EXTEND SELECTOR 270K-.82M INBD AUTOBRAKE DISARM ANTISKID AUTO E6 RACK TRANSDUCER (AFT CARGO COMPARTMENT) (12) P2 CENTER FORWARD PANEL...
Page 510 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE SELECTOR Purpose If a disarm condition occurs when the selector is in 1 through MAX AUTO, the latch solenoid releases the The autobrake selector permits selection of a landing selector to DISARM. autobrake deceleration rate or the rejected takeoff function.
Page 511 777 TRAINING MANUAL AUTOBRAKE DISARM BSCU AUTO P2 CENTER FORWARD PANEL DECELERATION MAX COMMAND DELAY AFTER SW POS LEVEL (FT/SEC2) PRESS (PSI) GND SIG (SEC) 1,385 1,600 1,850 2,150 MAX AUTO 11.0 3,100 3,100 ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE SELECTOR 32-42-00 - 499 - ALTEON PROPRIETARY.
Page 512 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID TRANSDUCER Purpose In-axle transformer In-axle adapter. Antiskid transducers supply wheel speed data to the BSCU to get wheel deceleration input. This data also You remove the in-axle assembly from the axle as a unit goes to the BSCU for autobrake operation.
Page 513 777 TRAINING MANUAL HUBCAP IN-AXLE ADAPTER HUBCAP RELAY ANTI-SKID TRANSFORMER TRANSDUCER HUBCAP ANTI-SKID MAIN GEAR WHEEL INSTALLATION TRANSDUCER IN-AXLE TRANSFORMER ANTI-SKID TRANSDUCER INSTALLATION ANTISKID/AUTOBRAKE SYSTEM - ANTISKID TRANSDUCER 32-42-00 - 501 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 514 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- BRAKE SYSTEM CONTROL UNIT (BSCU) - INTRODUCTION Purpose The brake system control unit (BSCU) contains circuit cards for the antiskid and autobrake systems, and related BITE functions. It sends brake release inputs to the antiskid valve modules and brake application inputs to the autobrake valve module.
Page 515 777 TRAINING MANUAL CAUTION ELECTROSTATIC SENSITIVE EQUIPMENT SPECIAL HANDLING REQUIRED AFT CARGO COMPARTMENT (E6 RACK) BRAKE CONTROL UNIT PART NO. 42 907 SER NO DATE MFD BSCU ANTISKID/AUTOBRAKE SYSTEM - BRAKE SYSTEM CONTROL UNIT (BSCU) - INTRODUCTION 32-42-00 - 503 - ALTEON PROPRIETARY.
Page 516 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- BSCU - PHYSICAL DESCRIPTION General antiskid system with digital, analog, and discrete inputs. The BSCU contains two different types of circuit cards: Antiskid card (4) Autobrake/BITE/Comm card (2). Antiskid Card The four antiskid cards each control antiskid valves to operate the antiskid functions for a set of three wheels.
Page 517 777 TRAINING MANUAL TO LEFT ARINC BITE/L-COMM CARD 629 SYSTEMS BUS DIGITAL, ANALOG, AND DISCRETE INPUTS TO RIGHT ARINC AUTOBRAKE/BITE/R-COMM CARD 629 SYSTEMS BUS AUTOBRAKE VALVE MODULE INTERNAL FAULT COMMUNICATION MONITOR LINKS ANTISKID CARD (4) 1,5,9 ANTISKID ANTISKID 2,6,10 MODULES (4) TRANSDUCERS (12) 3,7,11 4,8,12...
Page 518 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID MODULES - INTRODUCTION Purpose Alternate Antiskid Modules There are two normal antiskid modules and two alternate There are two alternate antiskid modules: one for each antiskid modules in the antiskid system. main landing gear. The modules are the same. Each module has four valves.
Page 519 777 TRAINING MANUAL LEFT MLG TRUNNION DOOR LEFT MLG SHOCK STRUT BEAM DOOR INBD ACCESS PANEL INBD SYSTEM PRESSURE INLET SHUTOFF VALVE LEFT MLG FILTERS SYSTEM PRESSURE INLET SHUTOFF VALVE FILTERS ANTISKID ANTISKID VALVE (6) VALVE (4) BYPASS LEVER (RESET DOWN) BYPASS LEVER (RESET DOWN) HYDRAULIC...
Page 520 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID MODULES - FUNCTIONAL DESCRIPTION THIS PAGE INTENTIONALLY LEFT BLANK 32-42-00 - 508 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 521 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID MODULES - FUNCTIONAL DESCRIPTION General of system pressure. When the shutoff valve closes, it uses metered pressure to control the first stage. The operation of normal and alternate antiskid modules is the same. The number of antiskid valves and Antiskid Valve hydraulic fuses is the only difference between the two modules.
Page 522 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID MODULES - FUNCTIONAL DESCRIPTION When there is no metered brake pressure, the spring Return Check Valve holds the spool in position to send initial brake metered pressure to fill the brakes before the shutoff If the return line has a blockage, and metered pressure valve opens.
Page 523 777 TRAINING MANUAL ANTISKID VALVE TORQUE MOTOR (FIRST STAGE) AND ARMATURE FLAPPER NOZZLES SHUTOFF CONTROL INTERNAL VALVE ORIFICE NON LRU BYPASS BIAS SPRING FILTER (6) CHECK VALVE RIGHT HYDRAULIC SYSTEM PRESSURE FILTER RETURN METERED BRAKE PRESSURE RETURN LINE CHECK ANTISKID SPOOL VALVE BRAKE VALVE (SECOND STAGE)
Page 524 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID SHUTTLE VALVE MODULE Purpose You use the shuttle valve to do a deactivation of a brake in the normal brake system. To lock the related Two shuttle valve modules select the highest metered shuttle valve in the ALTERNATE position, you remove the pressure source and send it to the brakes.
Page 525 777 TRAINING MANUAL INBD INBD NORMAL BRAKE CARTRIDGE METERED VALVE (6) PRESSURE IN FILTER (6) TO BRAKE ACCESS PANEL TRUNNION DOOR NORMAL BRAKE NORMAL BRAKE SHUTTLE METERED METERED COVER (6) PRESSURE PRESSURE FLIGHT SHUTTLE DISPATCH BRAKE BRAKE DISCONNECT ALTERNATE PRESS/ ALTERNATE PRESS/ GEAR RETRACT GEAR RETRACT...
Page 526 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE VALVE MODULE Purpose This pressure causes the shutoff valve to open and permits the system pressure to go to the control valve. The autobrake valve module gets BSCU electrical signals to send right hydraulic system pressure to the normal The solenoid valve pressure switch sends a signal to brake system during autobrake operation.
Page 527 777 TRAINING MANUAL RIGHT HYDRAULIC RETURN SYSTEM PRESSURE AUTOBRAKE VALVE MODULE SOLENOID VALVE RIGHT HYDRAULIC SYSTEM PRESSURE VALVE SHUTOFF VALVE AUTOBRAKE PRESS PRESSURE CTRL CONTROL VALVE RIGHT MLG WHEEL WELL VALVE FIRST CTRL STAGE VALVE SECOND STAGE CTRL VALVE PRESS XDCR SOLENOID VALVE PRESSURE SWITCH...
Page 528 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE SHUTTLE VALVE Purpose Two autobrake shuttle valves select the highest of autobrake or normal brake metered pressures and send it to the brakes. Location The autobrake shuttle valves are on the forward wall in the left and right main landing gear wheel wells.
Page 529 777 TRAINING MANUAL RIGHT BRAKE METERING VALVE (REF) RIGHT AUTOBRAKE SHUTTLE VALVE RIGHT MAIN LANDING GEAR WHEEL WELL (LEFT ALMOST THE SAME) RIGHT NORMAL BRAKE METERED PRESSURE TRANSDUCER (REF) RIGHT BRAKE METERED PRESSURE SWITCH (REF) (LEFT ALMOST THE SAME) ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE SHUTTLE VALVE 32-42-00 - 517 - ALTEON PROPRIETARY.
Page 530 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- BRAKE METERED PRESSURE TRANSDUCERS Purpose Four brake metered pressure transducers send normal and alternate metered pressure information to the BSCU for anti-skid and autobrake control. Location The two normal brake metered pressure transducers are on the left and right autobrake shuttle valves in the main landing gear wheel wells.
Page 531 777 TRAINING MANUAL RIGHT BRAKE RIGHT AUTOBRAKE METERING VALVE SHUTTLE VALVE MODULE (REF) (REF) RIGHT NORMAL BRAKE METERED PRESSURE TRANSDUCER RIGHT ALTERNATE BRAKE METERED PRESSURE TRANSDUCER FORWARD BULKHEAD OUTBD RIGHT MAIN LANDING GEAR WHEEL WELL (LEFT SIMILAR) RIGHT MAIN LANDING GEAR BEAM (LEFT SIMILAR) ANTISKID/AUTOBRAKE SYSTEM - BRAKE METERED PRESSURE TRANSDUCERS 32-42-00...
Page 532 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- FUNCTIONAL DESCRIPTION - INTRODUCTION General Alternate Antiskid Operation The BSCU uses antiskid transducer signals to control The alternate brake metering valves send metered center the normal and alternate antiskid valve modules. hydraulic system pressure to the alternate antiskid modules.
Page 533 777 TRAINING MANUAL CENTER RIGHT HYD SYS/ HYD SYS ACCUMULATOR ALTN BRAKE NORM BRAKE AUTOBRAKE VALVE METERING METERING VALVE VALVE MODULE AUTOBRAKE SHUTTLE VALVE BSCU ALTN NORMAL ANTI-SKID SURGE ANTI-SKID ANTI-SKID ACCUMULATOR VALVE MOD VALVE MOD (LEFT ONLY) RIGHT SYS RETURN ANTI-SKID SHUTTLE...
Page 534 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID FUNCTIONAL DESCRIPTION - ANTISKID CARDS General Alternate Antiskid Operation The four antiskid cards work together in pairs to Primary and secondary control for the alternate supply primary and backup antiskid control. The 1,5,9 antiskid system is similar to the normal system.
Page 535 777 TRAINING MANUAL 28V DC 1,5,9 CAPT FLT NORMAL INST BUS P310 VALVES PRIMARY 1,5,9 1-5,9 DRIVER CONTROLLER TRANSDUCERS ALTN 1,5,9 VALVES DRIVER PRIMARY DRIVER CONTROLLER 3,7,11 3,7,11 DRIVER NORMAL DRIVER FWD-MID VALVES DRIVER SECONDARY 3,7,11 CONTROLLER DRIVER TRANSDUCERS 3,7,11 DRIVER FWD-MID 3-7,11...
Page 536 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID FUNCTIONAL DESCRIPTION - CONTROLLERS General The Autobrake/BITE/Comm cards monitor the controllers for antiskid fault data. They send this information to The antiskid cards use primary and secondary the AIMS for flight deck display. controllers to supply these functions: Skid control Locked wheel protection...
Page 537 777 TRAINING MANUAL FULL BRAKE RELEASE NORMAL NORMAL FWD WHL SKID CTRL SPEED VALVE VALVE ALLOW DRIVER FULL LOCKED BRAKES WHL CTRL ALTN ALTN FWD-MID FWD WHEEL VALVE VALVE HIGHER DRIVER NORMAL NORMAL MID WHL SKID CTRL SPEED VALVE VALVE DRIVER LOCKED WHL CTRL...
Page 538 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID FUNCTIONAL DESCRIPTION - PROTECTION MODES - 1 Skid Control Skid control compares calculated wheel speed velocity with a velocity model to control brake force. If a wheel slows down too quickly, skid control releases brake pressure until the wheel speed increases.
Page 539 777 TRAINING MANUAL NORMAL FWD WHL FULL BRK REL WHEEL VELOCITY SPD <8 SPEED VELOCITY VALVE KTS - COMPARATOR DRIVER APPLY VELOCITY MODEL FULL SKID CONTROL BRAKE ALTN FWD-MID VALVE DRIVER FWD SPD <30% OF WHL SPD HIGHER >25 KTS MID OR AFT SPD LOCKED WHEEL PROTECTION FWD WHEEL CONTROL...
Page 540 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- ANTISKID FUNCTIONAL DESCRIPTION - PROTECTION MODES - 2 Hydroplane/Touchdown Protection Average wheelspeed is less the 45 knots Normal brake metered pressure is between 250 and Hydroplane/touchdown protection operates only on the 1800 psi. aft wheels. This mode protects against hydroplaning and also prevents locked aft wheels during touchdown.
Page 541 777 TRAINING MANUAL FULL BRAKE RELEASE NORMAL FWD FWD WHL FWD WHEEL CTRL VALVE DRIVER SPEED ALLOW FULL BRAKES ALTN FWD-MID HIGHER VALVE DRIVER MID WHL MID WHEEL CTRL SPEED FULL NORMAL MID BRAKE VALVE DRIVER RELEASE AFT WHEEL CTRL ALTN AFT VALVE DRIVER NORMAL AFT...
Page 542 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE CONTROL - FUNCTIONAL DESCRIPTION General The BSCU uses the Autobrake/BITE/R-Comm card to operate the autobrake system for landing and rejected takeoff. The BITE/L-Comm card supplies alternate BITE and secondary communication for the BSCU. Autobrake control gets power from the left and right main dc buses.
Page 543 777 TRAINING MANUAL 28V DC RT MAIN SOLENOID AUTOBRAKE VALVE P210 ENABLE DISARM 28V DC RELAY AUTOBRAKE AUTO LT MAIN SOL PRESS CONTROL SWITCH P110 P2 CTR FWD PNL CONTROL VALVE NOT IDLE CTRL VLV PRESS XDCR AUTOBRAKE VALVE MODULE DIGITAL, ANALOG, BITE/...
Page 544 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - LANDING ARMING LOGIC General AUTOBRAKE 2 AUTOBRAKE 3 The selector latch solenoid holds the autobrake AUTOBRAKE 4 selector in the selected deceleration position when AUTOBRAKE MAX. these arming conditions occur: You move the autobrake selector to a deceleration position (1, 2, 3, 4, MAX AUTO) Air mode (the two trucks TILTED or the landing gear...
Page 545 777 TRAINING MANUAL AUTOBRAKE DISARM AUTO AUTOBRAKE SEL (1,2,3,4, MAX AUTO) AIR MODE AUTOBRAKE SELECTOR THRUST LEVERS AT IDLE LATCH SOLENOID GND MODE FOR < 3 SEC NORM BRK MTRD PRESS (2) < 1500 PSI ENABLE DRIVER NO AUTOBRAKE STATUS MESSAGES ACTIVE NO ANTISKID ADVISORY MESSAGE ACTIVE NORMAL BRAKE SYS HYD PRESS AVAILABLE VALID ADIRU DECEL DATA...
Page 546 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - LANDING APPLICATION LOGIC General The autobrake function applies the brakes when these conditions occur: Autobrake selector is in 1, 2, 3, 4, or MAX AUTO Thrust levers are in the idle position Ground mode (the two trucks are UNTILTED and the landing gear control lever is DOWN after a 0.1 second time delay)
Page 547 777 TRAINING MANUAL 28V DC - THRUST LEVER - L2 SW 28V DC - THRUST LEVER - R2 SW SOLENOID VALVE CONTROL VALVE COMMAND CONTROL VALVE AUTOBRAKE SELECTOR ARMED AUTOBRAKE THRUST LEVERS AT IDLE VALVE MODULE GND MODE (PLUS 0.1 SECOND TIME DELAY) >3 SEC LATCH WHEEL SPIN-UP (AVG WHL SPD >...
Page 548 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - LANDING A/B DISARM LOGIC General Any of these conditions cause the autobrakes to disarm: You turn the autobrake selector to the OFF or DISARM position Left or right normal brake metered pressure is more than autobrake pressure Left or right thrust lever is out of the idle position after the airplane is on the ground for...
Page 549 777 TRAINING MANUAL SOLENOID 28V DC VALVE PRESS CONTROL VALVE CTRL 28V DC AUTOBRAKE VALVE MODULE AUTOBRAKE SELECTOR - OFF OR DISARM EITHER NORM BRK MTRD PRESS > AUTOBRAKE PRESS A THRUST LEVER NOT IN IDLE POSITION GROUND MODE 3 SEC SPEEDBRAKE LEVER (STOW AFTER DEPLOY ON GND) EITHER AUTOBRAKE STATUS MESSAGE SHOWS AUTOBRAKE...
Page 550 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO ARM LOGIC General The autobrake selector latch solenoid holds the autobrake selector in the RTO position when the following arming conditions occur: You move the autobrake selector to the RTO position Ground mode (the two trucks are UNTILTED and the landing gear lever is DOWN)
Page 551 777 TRAINING MANUAL AUTOBRAKE DISARM AUTO AUTOBRAKE SEL - RTO POSITION AUTOBRAKE SELECTOR GND MODE ENABLE LATCH DRIVER SOLENOID NO AUTOBRAKE STATUS MESSAGES ACTIVE AUTOBRAKE/BITE/R-COMM CARD ANTISKID/AUTOBRAKE SYSTEM - AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO ARM LOGIC 32-42-00 - 539 - ALTEON PROPRIETARY.
Page 552 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO A/B APPLICATION LOGIC General The RTO function applies right hydraulic system pressure to the brakes when these conditions occur: The autobrake selector is in the RTO position Wheel spin-up (average wheel speed of the 4th, 5th, 6th, and 7th fastest wheels is more than 85 knots) After 85 knots, all four thrust lever switches...
Page 553 777 TRAINING MANUAL 28V DC - THRUST LEVER - L2 SW 28V DC - THRUST LEVER - R2 SW SOLENOID VALVE CONTROL FULL PRESSURE COMMAND VALVE AUTOBRAKE VALVE MODULE AUTOBRAKE SELECTOR ARMED WHEEL SPIN-UP (AVG WHL SPD >85 KTS) LATCH THRUST LEVERS AT IDLE NO AUTOBRAKE STATUS MESSAGES ACTIVE NO ANTISKID ADVISORY MESSAGE ACTIVE...
Page 554 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- AUTOBRAKE FUNCTIONAL DESCRIPTION - RTO A/B DISABLE LOGIC Landing Disarm Logic Full hydraulic system pressure stays applied to the brakes until RTO autobrake is disabled by one of these conditions: You move the autobrake selector to the OFF position Left or right normal metered brake pressure is more than 2400 psi...
Page 555 777 TRAINING MANUAL SOLENOID 28V DC VALVE CONTROL FULL PRESSURE COMMAND VALVE 28V DC AUTOBRAKE VALVE MODULE AUTOBRAKE SELECTOR - OFF LEFT OR RIGHT NORM BRK MTRD PRESS >2400 PSI EITHER THRUST LEVER NOT IN IDLE SPEEDBRAKE LEVER (DOWN AFTER GND DEPLOY) EITHER AUTOBRAKE STATUS MESSAGE ACTIVE AUTOBRAKE PRESS <750 PSI AUTOBRAKE...
Page 556 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- INDICATIONS General Landing Gear Brks/Strg Maintenance Page The primary and secondary bite cards in the BSCU send When a fault and a CMC maintenance message for a wheel antiskid and autobrake fault data to AIMS for flight are active, one of these labels, shown in decreasing deck display.
Page 557 777 TRAINING MANUAL LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS L TILLER R TILLER DOOR CLOSED MAIN GEAR LEFT RIGHT BRAKE TEMP ASKID ASKID ASKID CARD BRAKE ALTN XDCR BRAKE DEACT ASKID ASKID ASKID ASKID VALVE TIRE PRESS AFT AXLE AFT AXLE LOCKED...
Page 558 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- SYSTEM TESTS General Autobrake Application A maintenance access terminal (MAT) is necessary for The autobrake application test does a check of the this procedure. autobrake system. The test applies and releases brake pressure to all the brakes. These are the system tests for the antiskid and autobrake systems: Wheelspeed Transducer Spin...
Page 559 777 TRAINING MANUAL Select System Test GROUND TESTS 32 ANTISKID/AUTOBRAKE CONTROL SYSTEM Select ATA System (60) SYSTEM TESTS: Select Test Type 31 AIMS - Flight Data Recorder System SYSTEM 31 Printer SYSTEM INTERFACE TEST 31 AIMS - Airplane Condition Monitoring System 31 AIMS - Left AIMS OPERATIONAL ANTISKID BRAKE RELEASE...
Page 560 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- LRU REPLACEMENT TESTS General Autobrake Valve Module These are the LRU replacement tests for the antiskid The autobrake valve module replacement test does a and autobrake systems: check of the autobrake system. The test applies and releases brake pressure to all of the brakes.
Page 561 777 TRAINING MANUAL Select LRU Replacement Test GROUND TESTS 32 ANTISKID/AUTOBRAKE CONTROL SYSTEM Select ATA System (60) LRU REPLACEMENT TESTS: Select Test Type 31 AIMS - Flight Data Recorder System SYSTEM 31 Printer BRAKE SYSTEM CONTROL UNIT TEST 31 AIMS - Airplane Condition Monitoring System 31 AIMS - Left AIMS OPERATIONAL 31 AIMS - Right AIMS...
Page 562 777 TRAINING MANUAL ANTISKID/AUTOBRAKE SYSTEM -- SPECIAL FUNCTIONS General remove the new ANTISKID advisory message caused by the second failure. You can do a deactivation of one brake on each six wheel truck for dispatch. You can do the deactivation of the brakes by one of these steps: Install a flight dispatch disconnect tool in the brake position on the related antiskid shuttle...
Page 563: Disable Function
777 TRAINING MANUAL Select Function SPECIAL FUNCTIONS ANTISKID INDICATION DISABLE Select ATA System (21) 24 Flight Control DC Power System 26 Cargo Smoke Detection System 27 Primary Flight Control System 31 AIMS - DISPLAY SYSTEM 27 High Lift System 31 AIMS - Flight Data Recorder System 31 AIMS - Display System 32 Air/Ground System 32 Antiskid/Autobrake Control System...
Page 564 777 TRAINING MANUAL BRAKE TEMPERATURE MONITORING SYSTEM -- INTRODUCTION Purpose The brake temperature monitoring system (BTMS) gets brake temperature inputs from the twelve main gear brakes. It supplies this data for flight deck indication. Components These are the brake temperature monitoring system components: Brake temperature sensor (12) Brake temperature compensation module (2)
Page 565 777 TRAINING MANUAL BRAKE TEMP AIMS COMPENSATION MODULE BRAKE TEMP COMPENSATION MODULE LEFT SYSTEMS LEFT MAIN GEAR TBMU BRAKE TEMP SENSOR (6) ARINC 629 BUS LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS L TILLER R TILLER DOOR CLOSED MAIN GEAR LEFT RIGHT...
Page 566 777 TRAINING MANUAL BRAKE TEMPERATURE MONITORING SYSTEM -- SENSOR AND COMPENSATION MODULE Brake Temperature Sensor The brake temperature sensor is a thermocouple. It sends a brake temperature signal through the brake temperature compensation module to the tire and brake monitoring unit (TBMU). A brake temperature sensor is near the bottom of the brake in each of the main gear brake assemblies.
Page 567 777 TRAINING MANUAL INBD FORWARD ELECTRICAL JUNCTION BOX MAIN LANDING GEAR (3 WHEELS REMOVED) BRAKE TEMPERATURE COMPENSATION MODULE (COVER REMOVED) BRAKE TEMPERATURE SENSOR INBD BRAKE TEMPERATURE MONITORING SYSTEM - SENSOR AND COMPENSATION MODULE 32-46-00 - 555 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 568 777 TRAINING MANUAL BRAKE TEMPERATURE MONITORING SYSTEM -- MONITORING UNIT Purpose The tire and brake monitoring unit (TBMU) gets brake temperature signals from the brake temperature sensors. It gets these through the brake temperature compensation modules. The TBMU supplies this data to the AIMS.
Page 569 777 TRAINING MANUAL BRAKE SYSTEM CONTROL UNIT (BSCU) (REF) TIRE AND BRAKE MONITORING UNIT (TBMU) (REF) TBMU AFT CARGO COMPARTMENT (LOOKING AFT) BRAKE TEMPERATURE MONITORING SYSTEM - MONITORING UNIT 32-46-00 - 557 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 570 777 TRAINING MANUAL BRAKE TEMPERATURE MONITORING SYSTEM -- FUNCTIONAL DESCRIPTION General The left 28v dc bus supplies the electrical power for the brake temperature monitoring system. Brake Temperature Inputs The brake temperature sensors in each of the wheel brakes send temperature signals to the brake temperature compensation modules.
Page 571 777 TRAINING MANUAL 28V DC TEMP LEFT BUS L G BRAKE 1038 C TEMP MONITOR 538 C P110 LEFT POWER MGMT PANEL 38 C 5.0 9.9 DISPLAY DATA AIMS BRAKE TEMP GENERATION BRAKE TEMP COMPENSATION SENSOR (6) MODULE LEFT MAIN GEAR COMPONENTS BRAKE TEMP BRAKE TEMP FAULT MONITOR...
Page 572 777 TRAINING MANUAL BRAKE TEMPERATURE MONITORING SYSTEM -- INDICATION General Brake temperature indication shows on the landing gear synoptic display and the brake and steering maintenance page. Brake Temperature Indication Brake temperature between approximately 38C (100F) and 1038C (1900F)shows as a number on a linear scale between 0.0 and 9.9.
Page 573 777 TRAINING MANUAL BRAKE SYMBOL LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS L TILLER R TILLER DOOR CLOSED MAIN GEAR LEFT RIGHT BRAKE TEMP AFT AXLE AFT AXLE LOCKED LOCKED BRAKE METERED PRESS 3000 3000 NORM AUTOBRAKE NORM CLOSED CLOSED DOOR...
Page 574 777 TRAINING MANUAL TIRE PRESSURE INDICATION SYSTEM -- INTRODUCTION Purpose The tire pressure indication system measures the tire pressures for the two nose gear and twelve main gear tires. Components These are the tire pressure indicating system components: Tire pressure sensor/fill valve (14) Hubcap relay transformer (14) In-axle transformer (14) Tire and Brake Monitoring Unit (TBMU).
Page 575 777 TRAINING MANUAL HUBCAP IN-AXLE RELAY AIMS TRANSFORMER TRANSFORMER TIRE PRESSURE SENSOR/FILL VALVE (14) TBMU LEFT ARINC 629 SYSTEM BUS LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS L TILLER R TILLER DOOR CLOSED MAIN GEAR LEFT RIGHT BRAKE TEMP TIRE PRESS AFT AXLE AFT AXLE...
Page 576 777 TRAINING MANUAL TIRE PRESSURE INDICATION SYSTEM -- TIRE PRESSURE SENSORS AND AXLE COMPONENTS Location Training Information Point A tire pressure sensor/fill valve is on each wheel. To remove a tire pressure sensor/fill valve, you need There is one hubcap relay transformer and one in-axle to deflate the tire completely.
Page 577 777 TRAINING MANUAL IN-AXLE TRANSFORMER RELAY TRANSFORMER HUBCAP SENSOR WIRE SENSOR WIRE PRESSURE SENSOR/ PRESSURE SENSOR/ ANTI-SKID FILL VALVE FILL VALVE TRANSDUCER MAIN GEAR WHEEL (HUBCAP REMOVED) MAIN GEAR WHEEL INSTALLATION TIRE PRESSURE INDICATION SYSTEM - TIRE PRESSURE SENSORS AND AXLE COMPONENTS 32-49-00 - 565 - ALTEON PROPRIETARY.
Page 578 777 TRAINING MANUAL TIRE PRESSURE INDICATION SYSTEM -- MONITOR UNIT Purpose The tire and brake monitoring unit (TBMU) supplies power to the tire pressure sensors. It receives the tire pressure inputs and sends this data to the AIMS. The TBMU also monitors the tire pressure indication system components for faults.
Page 579 777 TRAINING MANUAL BRAKE SYSTEM CONTROL UNIT (BSCU)(REF) E6-3 SHELF - TIRE AND BRAKE MONITOR UNIT (TBMU) TBMU AFT CARGO COMPARTMENT (LOOKING AFT) TIRE PRESSURE INDICATION SYSTEM - MONITOR UNIT 32-49-00 - 567 - ALTEON PROPRIETARY. Copyright. See title page for details...
Page 580 777 TRAINING MANUAL TIRE PRESSURE INDICATION SYSTEM -- FUNCTIONAL DESCRIPTION Power Supply TIRE PRESS (Status) - non-normal tire pressure conditions. The left 28vdc MAIN bus supplies the electrical power to operate the tire pressure indication system. Non-normal tire pressure conditions include: TBMU - Tire Pressure Sensor Tire pressure below 100 psi Main gear tire pressure different from average...
Page 581 777 TRAINING MANUAL 28V DC LEFT MAIN BUS EXCITATION L G TIRE SIGNAL PRESSURE GENERATION INDICATOR P110 LEFT POWER MGMT PANEL DATA DISPLAY HUBCAP PRESSURE IN-AXLE NON-NORMAL RELAY SENSOR TRANSFORMER CONDITION TRANSFORMER CALCULATION WHEEL AND AXLE COMPONENTS FAULT/MONITOR TIRE AND BRAKE MONITORING UNIT TIRE PRESS EICAS DISPLAY AIMS...
Page 582 777 TRAINING MANUAL TIRE PRESSURE INDICATION SYSTEM -- INDICATIONS General Tire pressure indication, shows in psi on the landing gear synoptic display and the brake and steering maintenance page. Tire Pressure Indication The landing gear synoptic display and the brake and steering maintenance page show normal tire pressure in white.
Page 583 777 TRAINING MANUAL LANDING GEAR BRKS/STRNG NOSE GEAR STEERED ANGLE TIRE PRESS L TILLER R TILLER DOOR CLOSED MAIN GEAR LEFT RIGHT BRAKE TEMP TIRE PRESS AFT AXLE AFT AXLE LOCKED LOCKED BRAKE METERED PRESS 3000 3000 NORM AUTOBRAKE NORM CLOSED CLOSED DOOR...
Page 584 777 TRAINING MANUAL WHEELS AND BRAKES -- SUMMARY General Brake pedal movement controls hydraulic pressure to the main landing gear brakes. The airplane rests on 14 wheels and tires. The brakes apply during landing gear retraction through Control for the brake system pressure comes from the the alternate brake metering valves.
Page 585 777 TRAINING MANUAL RIGHT HYD POWER PRESS SWITCH CENTER HYD POWER MLG RETRACT PRESSURE ALTN SOURCE SELECTOR PRESS BRAKE VALVE SWITCH PRESS GAUGE ACCUMULATOR PRESS XDCR ACCUMULATOR ISOLATION VALVE BRAKE PEDAL BRAKE PEDAL CABLES TO CABLES TO QUADRANT QUADRANT ALTERNATE BRAKE NORMAL BRAKE NORMAL BRAKE ALTERNATE BRAKE...