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Lightwing AC4 Aircraft Flight Manual

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AFM
Lightwing AC4
Aircraft Flight Manual
For the Airplane
Lightwing AC4
Document No: LW-RL-Z-002
This document is issued for the following airplane:
Registration:
HB-WEB
Serial Number: 003
Date & Signature Lightwing:
04.04.2018, Marco Trüssel, Light Wing AG
Page 1
Rev.:2
LW-RL-Z-002
23.03.2018

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  • Page 1 Lightwing AC4 Aircraft Flight Manual For the Airplane Lightwing AC4 Document No: LW-RL-Z-002 This document is issued for the following airplane: Registration: HB-WEB Serial Number: 003 Date & Signature Lightwing: 04.04.2018, Marco Trüssel, Light Wing AG Page 1 Rev.:2 LW-RL-Z-002 23.03.2018...

  • Page 2: Lw-Rl-Z

    Lightwing AC4 0.1 Amendments Any revision of the present manual has to be registered in the following chart. Rev. Description Date Approval Pages 1..85 1st Edition. 12-May-14 EASA.A.588, 17.6.14 ELA1-HB Renumbered to document LW-RL-Q-003 LW-RL-Z-002 Rev.:0 1..87 02-Mar-16 - addition heating system...
  • Page 3 Lightwing AC4 0.2 List of approved sections Section Name Status Limitations Approved (EASA.A.588) Emergency procedures Approved (EASA.A.588) Performance Approved (EASA.A.588) 6.1 & 6.2 Weight and Balance Approved (EASA.A.588) Page 3 Rev.:2 LW-RL-Z-002...
  • Page 4 Lightwing AC4 0.3 List of effective pages Page Date Page Date Page Date Cover 23-03-18 23-03-18 23-03-18 Page 4 Rev.:2 LW-RL-Z-002...

  • Page 5: Table Of Contents

    Lightwing AC4 0.4 Table of contents This aircraft flight manual supplement consists of the following parts: General Limitations Emergency procedures Normal procedures Performance Weight and balance / equipment Aircraft and systems description Handling and maintenance Following the recommended structure for flight manuals as defined in GAMA Specification No.

  • Page 6: General

    CAUTION: This airplane flight manual has to be carried on board at all times. 1.2 Certification Basis The AC4 is certified on 17-Jun-2014 by the European Aviation Safety Agency (EASA) under CS-LSA with type certificate EASA.A.588. Category: Light Sport Aircraft;...
  • Page 7 General Lightwing AC4 1.3 Warnings, cautions and notes Statements in this handbook, which are particularly important for safety of flight or operation of the airplane, are highlighted by one of the following notions: WARNING: means that non-observance of the respective procedure leads to immediate or considerable reduction of flight safety.
  • Page 8 Lightwing AC4 General 1.4 Descriptive data The Lightwing AC4 aircraft is a single engine two-seater light sport airplane with side by side seating. It is built in a high strutted wing configuration with a conventional strutted tail. The aircraft has a dual control system with a single central control stick.
  • Page 9 General Lightwing AC4 Pitch trim (left elevator): Trim tab with an electric actuator at the left hand elevator trailing edge. Geometric deflection versus elevator: 5° up / 27° dwn ± 2° Vertical tail surfaces surface: 1.207 m deflection: left/right 25° ± 2°...
  • Page 10 Lightwing AC4 General 1.4.2 Powerplant Engine: Rotax 912iSc/iS "Sport" naturally aspirated, 4 Stroke petrol engine, with 4 horizontally opposed cylinders with dry sump lubrication, dual ignition with breakerless capacitor discharge design, fuel injection supplied by a dual electric fuel pump, liquid cooled cylinder heads, ram air cooled cylinders, prop drive gear reduction ratio of 2.43:1.
  • Page 11 General Lightwing AC4 1.4.3 Three side view Page 11 Rev.:2 LW-RL-Z-002...

  • Page 12: Limitations

    Lightwing AC4 Limitations 2 Limitations General ................13 Speeds ................. 13 Airspeed indicator markings ..........13 Powerplant ................14 Powerplant instrument markings .......... 15 Miscellaneous instrument markings ........16 Weight limits ................. 16 Approved manoeuvres ............16 Manoeuvring load factors ............. 16 2.10 Flight crew ................

  • Page 13: General

    Limitations Lightwing AC4 2.1 General This section deals with operating limitations, instrumentation and labels required for the safe operation of the aircraft, its engine, systems and equipment. CAUTION: Any violation of the defined limitations must be recorded in the airplane logbook! 2.2 Speeds...

  • Page 14: Powerplant

    Lightwing AC4 Limitations Range Mark Description km/h IAS Full flap operating range. (Lower extreme is V at maximum weight, flaps White arc 76-165 set 24°, idle power; Upper extreme is the maximum permissible speed with flaps extended) Normal operating range (Lower extreme...

  • Page 15: Powerplant Instrument Markings

    Limitations Lightwing AC4 Lubricant: high performance motorcycle oil with gear additives with API classification „SG“ or higher, see also Rotax information SI-912-i-001, last edition Coolant: Conventional e.g. BASF Glysantine Protect Plus G48 anticorrosion, mixture ratio 50% concentrate to 50% water, see Service Instruction SI-92 i-001 Propeller manufacturer: Neuform Composites GmbH&Co...

  • Page 16: Miscellaneous Instrument Markings

    Lightwing AC4 Limitations 2.6 Miscellaneous instrument markings none 2.7 Weight limits Maximum take-off mass: 600 kg Maximum permissible operational empty mass 405 kg Maximum loading aft baggage compartment: 25 kg Datum line for centre of gravity is 1 meter forward of the propeller flange.

  • Page 17: Flight Crew

    Unusable fuel quantity: 4 liter NOTE: Acceleration during take-off run may cause the low fuel warning light to illuminate with less than 12 liter of usable fuel. 2.13 Maximum passenger seating AC4 has one (1) passenger seat. Page 17 Rev.:2 LW-RL-Z-002...

  • Page 18: Other Limitations

    Lightwing AC4 Limitations 2.14 Other limitations Maximum permissible current 12V plug (charge&supply mode) 5Amp Maximum permissible current on USB outlet 1Amp 2.15 Limitation placards "This airplane must be operated in VFR-day only conditions in accordance with airplane flight manual LW-RL-Z-002"...

  • Page 19: Emergency Procedures

    Emergency procedures Lightwing AC4 3 Emergency procedures Introduction ................20 Engine emergencies ............. 20 3.2.1 Engine malfunction during takeoff run ......20 3.2.2 Engine malfunction after take off ........21 3.2.3 Engine malfunction during flight (Restart Procedure) ..21 3.2.4 Lane and Generator warning in flight ......

  • Page 20: Introduction

    Lightwing AC4 Emergency procedures 3.1 Introduction This section presents the checklist including description of recommended procedure for emergency situations. Emergency situations caused by failures on the aircraft or aircraft’s engine are rare when the required maintenance and pre-flight inspections are followed! Not all emergencies can be foreseen and described in the aircraft flight manual.

  • Page 21: Engine Malfunction After Take Off

    Emergency procedures Lightwing AC4 3.2.2 Engine malfunction after take off Speed ............... 115 km/h IAS Fuel Shutoff Valve ............. CLOSE Engine Key ................OFF Master Switch ................. OFF Landing ................. PERFORM 3.2.3 Engine malfunction during flight (Restart Procedure) Speed ............... 115 km/h IAS Fuel Shutoff Valve ..........

  • Page 22: Lane And Generator Warning In Flight

    Lightwing AC4 Emergency procedures 3.2.4 Lane and Generator warning in flight CAUTION: A constant warning light indicated a broken sensor. A reset of the engine is not likely to correct the situation and is not considered safe. Lane A warning blinking: A Lane A warning might occur in closed throttle flight.

  • Page 23: Exceeding Engine Limits

    Emergency procedures Lightwing AC4 3.2.5 Exceeding engine limits Coolant temperature, oil temperature, exhausts temperature: Reduce engine power setting to the minimum necessary and carry out precautionary landing. Any exceeding of the maximum admissible coolant or oil temperature has to be entered by the pilot into logbook, stating duration and extent of over-temperature condition.

  • Page 24: Fires

    Lightwing AC4 Emergency procedures 3.3 Fires 3.3.1 Engine fire on ground Fuel Shutoff Valve ..........CLOSE Engine Key ................OFF Airplane ..............EVACUATE Fire ................EXTINGUISH 3.3.2 Engine fire during flight Fuel Shutoff Valve ............. CLOSE Cockpit heating ............... OFF Throttle .................

  • Page 25: Glide

    1. Speed (best glide) ..........110 km/h IAS 2. Landing Field .............SEARCH 3. Safety Harnesses ............TIGHT 4. Landing ..... TOUCHDOWN WITH MINIMUM SPEED The best glide ratio of the AC4 in engine idle condition is 1:6.9 Page Rev.:2 LW-RL-Z-002...

  • Page 26: Landing Emergency

    Lightwing AC4 Emergency procedures 3.5 Landing emergency 3.5.1 Emergency landing without engine power CAUTION: The missing propeller slipstream reduces elevator authority during flaring. Safety Harnesses ..............TIGHT Fuel Shutoff Valve ..............OFF Engine Key ................OFF Approach speed ......... minimum 115km/h IAS Flaps ..............

  • Page 27: Recovery From Unintentional Spin

    Emergency procedures Lightwing AC4 3.6 Recovery from unintentional spin Should an unintentional spin occur, the following recovery procedure should be used: Power ..................IDLE Aileron ................NEUTRAL Rudder..............First NEUTRAL ........if needed approximately 1/2 against rotation Elevator ................UNLOAD Hold this control inputs until the rotation stops. After the rotation stops: Rudder................

  • Page 28: Other Emergencies

    Lightwing AC4 Emergency procedures 3.7 Other emergencies 3.7.1 Malfunctions of electrical system Over/under voltage indication, generator warning: Engine Key ..............SELECT B ..............wait for two seconds Engine Key ..............SELECT A ..............wait for two seconds Engine Key ..............SELECT B ..............
  • Page 29 Emergency procedures Lightwing AC4 If engine stops: Back-Up switch ................. ON Engine start ............According to 3.2.3 Electrical consumers ........Reduce to minimum Flight ........ TERMINATE AS SOON AS POSSIBLE Page Rev.:2 LW-RL-Z-002...

  • Page 30: Fuel Pressure Outside Range

    Lightwing AC4 Emergency procedures 3.7.2 Fuel Pressure outside range NOTE: Transient conditions (throttle slams) can result in temporary engine coughing and fuel pressure limit exceeding. Those temporary conditions are normal but should not last longer than 2 seconds. If the fuel pressure is too high:...

  • Page 31: Low Fuel Warning

    Emergency procedures Lightwing AC4 3.7.3 Low fuel warning If the low fuel warning flickers the remaining usable fuel is less than 2liter. If the low fuel warning illuminates permanent the remaining usable fuel in the fuel tank is less than 1liter! A precautionary landing must be initiated immediately.

  • Page 32: Normal Procedures

    Lightwing AC4 Normal procedures 4 Normal procedures Introduction ................33 Daily inspection ..............33 Pre-flight inspection .............. 34 Normal procedures ............... 36 4.4.1 Prior to engine start ............36 4.4.2 Engine start up .............. 36 4.4.3 Taxi ................37 4.4.4 Before take off ...............

  • Page 33: Introduction

    This chapter gives check-lists and description of operating procedures under normal conditions. 4.2 Daily inspection CAUTION: Even if the AC4 has been operated the day before, it is still mandatory to perform a thorough inspection and pre-flight check prior to the first flight of the day.

  • Page 34: Pre-Flight Inspection

    Lightwing AC4 Normal procedures NOTE: For detailed description of the procedure to check the engine and the minimum and maximum quantities of oil and coolant liquid refer to the Rotax 912iSC/iS Sport Operation Manual WARNING: The engine must not be started with any visible leak of operating fluids! 4.3 Pre-flight inspection...
  • Page 35 Normal procedures Lightwing AC4 Left Wing ....check structure and covering and zippers (3) Wing tip light ..............secured Left Wing Strut ........check attachment secured Left Aileron Control Linkage and Hinges ....check secured ASI Pitot Tube ..........check unobstructed Left fuselage Left Side of the Fuselage ........

  • Page 36: Normal Procedures

    Lightwing AC4 Normal procedures 4.4 Normal procedures 4.4.1 Prior to engine start Prefilght Inspection ............. COMPLETE Circuit Breakers ..............ALL IN Avionics Master Switch ............OFF All Electrical Consumers ............OFF Fuel Pump ................MAIN Control ................ free to move Instruments ................

  • Page 37: Taxi

    Normal procedures Lightwing AC4 Generator warning ............Check OFF If generator warning active: Throttle ..............Set 2800 RPM Generator warning ..........wait, check OFF Avionics Master Switch ............. ON MFD ................. set QNH 4.4.3 Taxi Parking Brake ..............RELEASE Brakes ................CHECK Nose Wheel Steering ............

  • Page 38: Take Off

    Lightwing AC4 Normal procedures NOTE: Change from A/B to B to A and back must not be executed fast. Wait at each selected position that the according Lane warning as are ON/OFF as applicable to the selected position. Never switch over directly from A/B to A or from A to A/B without holding at B Fuel Pressure ..............

  • Page 39: Climb

    Normal procedures Lightwing AC4 4.4.6 Climb Flaps ..............AS REQUIRED Speed ................ 114km/h IAS Fuel Pump ................MAIN Engine RPM ......REDUCE for fuel flow below 20l/h 4.4.7 Cruise Flaps ..................UP Throttle ..............AS REQUIRED Engine Instruments ............CHECK NOTE: Once a day the oil temperature should exceed 100°C for...

  • Page 40: After Landing

    Lightwing AC4 Normal procedures 4.4.11 After landing Throttle ................. IDLE Flaps ................RETRACT Transponder ................. STBY Fuel Pump ................MAIN 4.4.12 Shut down & Parking Parking brake ................. SET Avionics Master Switch ............OFF Engine Instruments ............CHECK Throttle .................. IDLE Elevator Trim ..........

  • Page 41: Performance

    Performance Lightwing AC4 5 Performance Introduction ................42 5.1.1 Use of performance tables ..........42 5.1.2 ISA Conversion ............. 44 5.1.3 Pressure to density altitude conversion ......45 Approved performance data ..........46 5.2.1 Airspeed indication error ..........46 5.2.2 Stall speeds..............
  • Page 42 Lightwing AC4 Performance 5.1 Introduction This chapter contains all relevant data for correct and detailed flight planning from take-off to landing. Graph and tabulated data are based good condition of airplane and engine average pilot experience All performance data are based on flight test and corrected for standard atmospheric conditions (ISA = 15°...
  • Page 43 Performance Lightwing AC4 Figure 5.1 Fuel consumption graph Page 43 Rev.:2 LW-RL-Z-002...
  • Page 44 Lightwing AC4 Performance 5.1.2 ISA Conversion The influence of actual outside temperature on density altitude can be determined with the following diagram. Page 44 Rev.:2 LW-RL-Z-002...
  • Page 45 Performance Lightwing AC4 Conversion Pressure Altitude to Density Altitude Conversion Pressure Altitude to Density Altitude 5.1.3 Pressure to density altitude conversion P ro c e dure P ro c e dure Procedure: Procedure: A.) Lo c a te P re s s ure Altitude o n IS A c o nditio n line A.) Lo c a te P re s s ure Altitude o n IS A c o nditio n line...
  • Page 46 Lightwing AC4 Performance 5.2 Approved performance data 5.2.1 Airspeed indication error Unless specifically stated all speed data in this handbook relate to indicated airspeed. The airspeed indication error has been determined to be small towards the stall but up to 8% at higher speeds. The error is largely dependent on the airspeed and less on the effects of flap and power setting.
  • Page 47 Performance Lightwing AC4 5.2.2 Stall speeds km/h IAS Bank angle Flap 0° 15° 30° 45° 60° 0° 10° 24° 5.2.3 Take off distances The presented data relate to normal take off procedure according to 4.4.5 in zero wind and the following conditions: Flaps: 10°...
  • Page 48 Lightwing AC4 Performance Ground roll distance increase approx. 20% per 5 kts tailwind decrease approx. 15% per 10 kts headwind decrease/increase approx. 10% per 1° runway slope increase approx. 20% for takeoff on dry short mown grass increase approx. 30% for takeoff on wet short mown grass 5.2.4 Landing distance...
  • Page 49 Performance Lightwing AC4 5.2.5 Climb performance The presented data relate to normal procedure climb according 4.4.6 in zero wind and the following conditions: Flap: 0° Power: Full throttle Airspeed V 108 km/h IAS for best rate of climb Airspeed V...
  • Page 50 Lightwing AC4 Performance Time to altitude: Distance to altitude: Page 50 Rev.:2 LW-RL-Z-002...
  • Page 51 Performance Lightwing AC4 Fuel to altitude: Page 51 Rev.:2 LW-RL-Z-002...
  • Page 52 Lightwing AC4 Performance 5.3 Additional performance data 5.3.1 Cruise performance The presented cruise performance is valid ISA conditions and MTOW 600kg Cruise performance IAS Cruise performance TAS Page 52 Rev.:2 LW-RL-Z-002...
  • Page 53 Performance Lightwing AC4 5.3.2 Range and endurance All data in this chapter relate to standard conditions and zero wind. The stated range and endurance data are valid for: Take off with maximum take of mass 600kg Full fuel tank 90liters usable...
  • Page 54 Lightwing AC4 Performance Endurance Page 54 Rev.:2 LW-RL-Z-002...
  • Page 55 Performance Lightwing AC4 5.3.3 Balked landing climb performance The presented data relate to zero wind and the following conditions: Flap: 24° Power: Full throttle Airspeed V 112 km/h IAS for best rate of climb Airspeed V 105 km/h IAS for best angle of climb at SL...
  • Page 56 5.3.5 Demonstrated cross wind component The demonstrated cross wind component for the AC4, which may or may not be limiting, is 10KTS. 5.3.6 Noise The noise level of the AC4, according to ICAO Annex 16, Chapter X, amounts to 66.2dB(A). Page 56 Rev.:2...

  • Page 57: Weight And Balance / Equipment

    The weighing record sheet (chapter 6.2.1) reflects actual status of empty mass and empty mass centre of gravity at time of last weighing. The AC4 reference system for weight and balance is: Datum: 1000 mm forward of propeller flange plane Levelling: fuselage main beam 4°...
  • Page 58 Lightwing AC4 Weight and balance Figure 3 Approved weight and balance envelope The approved flight centre of gravity location is expressed in mm aft datum. Conversion to %MAC is by: (Station - Station )/Lenght *100% Wing leading edge Page 58 Rev.:2...
  • Page 59 Weight and balance Lightwing AC4 6.2 Weight and balance 6.2.1 Actual empty mass The following table reflects the actual status of empty mass, empty mass centre of gravity and permissible maximum and minimum loading. The data is compiled from the latest weighing record. Data is only valid for the airplane serial number indicated on the front sheet of this handbook.
  • Page 60 Lightwing AC4 Weight and balance 6.2.2 Weight and balance determination for flight To calculate the flight mass and centre of gravity the following station data must be used: Occupant (seat fwd position) 2830 mm aft datum Occupant (seat aft position)
  • Page 61 Weight and balance Lightwing AC4 Example calculation (see blue line in Figure 3): Mass Center of Moment m [kg] gravity M = m*CG CG [mm] [kg*mm] Empty 386.6 2934 1134284 + baggage 3620 + pilots seat FWD 2830 + pilots seat AFT...
  • Page 62 Lightwing AC4 Weight and balance 6.3 Equipment The required functional equipment of the AC4 are - pneumatic airspeed indicator - pneumatic altimeter - magnetic compass - fuel quantity indicator - volt/amperemeter - engine indication system EMU912i EVO - all primary and secondary controls...

  • Page 63: Aircraft And Systems Description

    Aircraft & Systems Lightwing AC4 7 Aircraft and systems description Introduction ................64 Airframe ................64 Controls ................64 7.3.1 Elevator control ............. 65 7.3.2 Aileron control ............... 65 7.3.3 Rudder control ............... 65 7.3.4 Flap operation ............... 65 7.3.5 Elevator trim ..............

  • Page 64: Introduction

    7.1 Introduction 7.2 Airframe The AC4 structure is a simple design with a central main aluminium tube for the fuselage and tubular frameworks for all the rest. Wings and empennage are strutted. Except for the lifting surface covers and the fuselage aerodynamic shells, all load bearing structure is metal.

  • Page 65: Elevator Control

    Aircraft & Systems Lightwing AC4 7.3.1 Elevator control Elevators are controlled with push pull rods. Via two gearings at bell cranks, the actuation is delivered at the torsion tube at the leading edge of the elevator, which is just aft of the hinge line of the elevator.

  • Page 66: Elevator Servo Tab

    Lightwing AC4 Aircraft & Systems 7.3.6 Elevator Servo tab A flettner tab is employed on the right hand elevator side and controlled by a push/pull rod fixed to the tail strut. 7.4 Cockpit/Instrument Panel The cockpit is accessible by two upward opening doors. They are latched with two pins actuated by one rotating lever from in or outside.

  • Page 67: Landing Gear And Brake

    Figure 7-2 Cockpit instrument panel 7.5 Landing gear and brake The AC4 has a tricycle landing gear with a steerable nose wheel. The nose gear leg passes through the entire fuselage centre beam. An elastomeric insert is used to provide the spring/damping characteristics of the nose gear.

  • Page 68: Baggage Compartment

    In any case the pilot shall be familiar with the operation manual of the engine which is delivered with the airplane. The AC4 powerplant consists of the fuel injected Rotax 912iSc/iS Sport engine and a fixed pitch propeller type CR3-75 3-blade. The engine is air and liquid cooled.
  • Page 69 Aircraft & Systems Lightwing AC4 Figure 7-4 Engine top view In Figure 7-4 the engine serial number (3), airbox (4), electric starter (5), expansion tank (6) and oil filter (7) arrangements are shown, together with cylinder numbers. Direction of rotation on propeller shaft is clockwise, looking from the pilot seat.

  • Page 70: Fuel System

    Lightwing AC4 Aircraft & Systems There are two individual LANE warning lights. Any one flashing indicates a situation where flight operation is limited (no take off). Any one permanently on indicates a situation where are precautionary landing should be made. The warning light is also permanently on when only one LANE is selected by the engine key switch.
  • Page 71 Aircraft & Systems Lightwing AC4 Figure 7-5 Fuel quantity indicator CAUTION: It should be avoided to overfill fuel. The hose from the filler neck to the fuel tank should not be submerged. The filler neck is located on the left hand empennage cover. A sight gauge is installed aft of the co-pilot seat.
  • Page 72 Lightwing AC4 Aircraft & Systems Figure 7-6 Fuel storage system Figure 7-7 Engine fuel system Page 72 Rev.:2 LW-RL-Z-002...

  • Page 73: Electrical System

    Aircraft & Systems Lightwing AC4 7.10 Electrical system The heart of the system is provided by the fuse box of the engine manufacturer. The Rotax generation system provides a 12/14 V system voltage. On the airframe side it further features a lead battery located in the engine compartment, with a 12 Ah capacity at 12.7 V.

  • Page 74: Pitot/Static System

    Lightwing AC4 Aircraft & Systems 7.11 Pitot/static system The pitot port is located in the left wing, at the connection of the wing strut. It is routed thought the wing, then along the fuselage frame to the centre of the instrument panel. Static pressure is taken from the interior of the fuselage and routed to the instrument panel along the fuselage centre beam.
  • Page 75 Aircraft & Systems Lightwing AC4 Main Electric switch row: Engine control: Avionics (radio) master & Back-Up switch: Circuit breakers: GEN / MASTER / AV MASTER / 12V OUT / USB FLAPS / TRIM / LIGHTS / EMU COM / XPDR / NAV / FLARM...
  • Page 76 Lightwing AC4 Aircraft & Systems Fuel valve: Cabin Heat control PULL = ON Cabin heat control: AIRCRAFT DEVIATION calibration with receivers on For Steer For Steer For Steer Deviation placard, compass: Date: ..-…-... Door left and right, inside: Door left and right, outside:...
  • Page 77 Aircraft & Systems Lightwing AC4 Coolant reservoir: Oil reservoir : USABLE FUEL 90 LITERS Mogas/Avgas Min. 95 RON/ROZ, EN 228 Fuselage, filler neck: for other grades refer to AFM Main wheel tire pressure Main landing gear: 3.0 bar / 44 PSI...

  • Page 78: Avionics

    Lightwing AC4 Aircraft & Systems 7.13 Avionics The avionic units of the AC4 are powered via the radio-bus which has a separate circuit breaker and is controlled by the "Avionic master" switch. The (optional) ELT is installed on the left side of the main fuselage bean behind the baggage compartment.

  • Page 79: Engine Indication

    Aircraft & Systems Lightwing AC4 7.14 Engine indication A Stock flight EMU912iS evo is employed on the AC4. It indicates all engine parameters, but no fuel quantity. The software for the EMU is installed in production and locked. Software updates might be mandated or recommended by Light Wing AG through service bulletins and are uploaded by approved stations.

  • Page 80: Engine Data Information (Info) Page

    Lightwing AC4 Aircraft & Systems Figure 7-10 EMU912iS main display page The colour of the main page text information changes automatically according to the limit definitions as set forth in chapter 2.5. The squares labelled "A" and "B" indicate the status of the ECU lanes.

  • Page 81: System Information (Syst) Page

    Aircraft & Systems Lightwing AC4 selected using the up/down softkeys. The selected parameter group is depicted on a green background. An example for the layout of the INFO page is shown in Figure 7-11 Figure 7-11 Example INFO display page The various engine parameter groups may be selected using the up/down buttons.

  • Page 82: Flight Data Recording

    Lightwing AC4 Aircraft & Systems Figure 7-12 Example System Status Information 7.14.4 Flight Data Recording The EMU 912iS evo provides data recording of all data transmitted by the ECU. The data is stored on the SDHC card. For each restart of the EMU and after intervals of 30min, a new data file of arbitrary length is created and the previous one is closed.

  • Page 83: Cabin Heating System

    Lightwing AC4 7.15 Cabin heating system The AC4 features an optional cabin heating system which uses RAM air aft of the coolant radiator and guides it through an exhaust shroud. The heated air is further guided to a firewall mounted valve which either dumps the air back into the cowling area or, if the valve is selected by the pilot to ON, into the cabin below the instrument panel.
  • Page 84 Lightwing AC4 Aircraft & Systems Figure 7-14 Cabin heating valve at firewall, cabin side Page 84 Rev.:2 LW-RL-Z-002...

  • Page 85: Handling And Maintenance

    Lightwing AC4 Handling &maintenance 8 Handling and maintenance 8.1 Introduction This chapter provides information to the pilot relevant for maintaining the airplane in airworthy and good performing conditions. Note: Any work performed on the airplane by the pilot, except for general cleaning, should be noted in the airplane logbook.

  • Page 86: Light Wing Ag

    The maintenance manual LW-RL-Z-004 defines the relevant programs for scheduled inspection and maintenance. The AC4 scheduled inspection and maintenance program comprises: • Non repetitive aircraft inspection at 25hours after delivery of the aircraft.
  • Page 87 Lightwing AC4 Handling &maintenance 8.4 Ground handling Ground handling shall be done with care. Do not: push at wing tips pull at propeller tips push at control surfaces keep park brake set without reason lower the tail to raise nose gear for tight corner movements...
  • Page 88 Lightwing AC4 Handling &maintenance 8.5 Cleaning and care The composite surface is protected with a polyester gel coat. For cleaning those and the aerodynamic lifting surfaces covers use any car cleaning detergent. Insect removal detergents should be used as little as possible.

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