Page 1 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL THRUSH AIRCRAFT INC. TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Model S2R – T660 Serial Numbers T660 – 109 & Up Manual Number: T660 -3 Issued December 17, 2003 Revised January 10, 2005 Note: All serial numbers with the DC suffix indicate the dual cockpit configuration.
Page 2: General Information
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LOG OF PAGES Page Date Date Page i …………………………… 01/10/05 SECTION II (CONT’D) ii …………………………… 01/10/05 SERVICING iii …………………………… 01/10/05 34 ……………………………. 12/17/03 iv …………………………… 01/10/05 35 ……………………………. 12/17/03 …………………………….
Page 3 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LOG OF PAGES Page Date Page Date SECTION IV SECTION VI (CONT’D) POWER PLANT & LANDING GEAR PROPELLER ……………………………. 12/17/03 ……………………………. 01/10/05 ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 12/17/03 …………………………….
Page 4 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Page Date Page Date SECTION VII (CONT’D) SECTION X (CONT’D) FLIGHT CONTROLS ELECTRICAL ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 01/10/05 ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 12/17/03 ……………………………. 12/17/03 …………………………….
Page 5 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LOG OF PAGES Page Date SECTION X (CONT’D) ELECTRICAL ……………………………. 12/17/03 …………………………… 12/17/03 …………………………… 12/17/03 SECTION XI LIMITATIONS …………………………… 12/17/03 …………………………… 01/10/05 Effective: 01/10/05...
Page 7 INTRODUCTION This publication provides information for the Thrush Aircraft, Inc. Model S2RT660 Turbo Thrush Aircraft. Installations or equipment will vary from model to model due to the wide range of optional equipment. The information contained within this manual is based on data available at the time of publication and will be kept current by changes or service publications.
Page 8: Table Of Contents
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 1 GENERAL INFORMATION TABLE OF CONTENTS SECTION ONE ..........................1 GENERAL INFORMATION ......................2 GENERAL DESCRIPTION ......................2 PRINCIPAL DIMENSIONS ......................2 GENERAL ..........................2 WING............................3 HORIZONTAL STABILIZER AND ELEVATORS ..............3 VERTICAL STABILIZER AND RUDDER ..................3 AREAS ............................4...
Page 9: Section One
SECTION ONE GENERAL DESCRIPTION The Thrush Aircraft Inc Turbo Thrush is designed especially for agricultural flying. It is a monoplane featuring a full cantilever low wing and all metal construction. The design and construction of the airframe components assure all structural integrity, flight safety, and minimum maintenance requirements.
Page 10: Wing
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL WING Type Full Cantilever Airfoil Section Naca 4412 Dihedral 3.50 Degrees C. G. Range (See Airplane Flight Manual for pertinent data) -Fwd Limit 24.5 Inches Aft Of Datum -Aft Limit 30.0 Inches Aft Of Datum...
Page 11: Areas
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL AREAS Wing 405.0 Square Feet Aileron (Each) 23.40 Square Feet Flaps (Each) 26.70 Square Feet Stabilizer 39.30 Square Feet Elevators 20.40 Square Feet Elevator Tabs (Each) 1.30 Square Feet 10.59 Square Feet on T660-109 and subsequent Rudder 15.55 Square Feet on T660-109 and subsequent...
Page 12: Center Section
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL fuselage is covered with heat treated Alclad panels attached with camloc fasteners. Side skins can be removed using only a screwdriver, thus exposing the fuselage frame for thorough cleaning and inspection.
Page 13: Cockpit
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL COCKPIT The overturn structure is exceptionally strong and welded to "hard points" in the fuselage frame. The forward bracing supports the windshield support channels and is welded to a lateral tube that is curved to provide more head clearance.
Page 14: Fuel System
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL There are five links from the servo-piston. One goes to each blade root, and these links transmit forward motion of the servo-piston to the blade roots and pivot the blades in the decrease pitch direction.
Page 15: Landing Gear, Wheels & Brakes
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL tank transmits an electrical signal to the single fuel quantity indicator. The instrument reads both the left and right fuel tanks singularly as chosen by the electrical control switch, adjacent to the fuel quantity indicator gauge on the instrument panel.
Page 16: Electrical System
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL right panel. The left panel contains a clock, oil temperature, hour meter, fuel pressure, oil pressure, air filter Delta “P”, and fuel quantity gauges. The right panel contains a voltmeter, ammeter, and circuit breakers.
Page 17 THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 1 - 10 Effective: 12/17/03...
Page 18: Figure 1-2
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 1-2 1 – 11 Effective: 12/17/03...
Page 19 THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 2 SERVICING & INSPECTION TABLE OF CONTENTS SECTION TWO ..............................1 SERVICING ..............................3 GROUND HANDLING ..........................3 TOWING ..............................3 TAXIING ..............................3 PARKING ..............................3 MOORING ..............................3 JACKING ..............................
Page 20 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL CORROSION CONTROL ........................36 WINDSHIELD ............................37 HOPPER REPAIR ...........................37 FUEL TANK REPAIR ..........................37 BATTERY MAINTENANCE ........................37 LUBRICATION ............................38 2 - 2 Effective: 12/17/03...
Page 21: Servicing & Inspection
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL SECTION TWO SERVICING & INSPECTION Standard procedure for ground handling, servicing, inspection, airframe maintenance, lubrication, and storage are included in this Section. Adherence to these procedures on a scheduled basis can save many hours of maintenance and aircraft down time.
Page 22: Mooring
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL MOORING Park aircraft as previously outlined. In winds up to 20 knots, secure the aircraft at the wing tie down rings. For winds above 20 knots, tie the tail and main gear as well as the wings. Install external control surface locks.
Page 23: Cold Weather Maintenance Hints
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL COLD WEATHER MAINTENANCE HINTS The information that follows is intended only for the purpose of supplementing the existing information in this manual when operating the aircraft in cold weather. Keeping the aircraft in top maintenance condition during cold weather cannot be over stressed.
Page 24: Electrical Fires
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Fuel Condition Lever - Cut Off Ignition Switch - Off Master Switch - On Fuel Shutoff Valve - On Fuel Auxiliary Pump Switch - On This will provide lubrication for the engine-driven fuel pump. Engine Starter Switch –...
Page 25: Starting Engine
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL After a complete visual inspection has been accomplished, the following checklist may be used for the external prestart check. The aircraft should be headed into the wind and should have the wheel chocks in place.
Page 26: Engine Operational Check
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL When the engine attains idle rpm: Engine Starter Switch and Ignition Switch - Off Oil Pressure - Check 60 PSIG Minimum Fuel Auxiliary Pump - Off Fuel Pressure from Engine Driven Pump - Check 5 PSI Minimum Generator Charging –...
Page 27: Hydraulic System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL HYDRAULIC SYSTEM The hydraulic system consists of two master brake cylinders and the necessary hydraulic lines connecting the master cylinders to the wheel brake cylinders. Applying toe pressure on the rudder pedals actuates the master cylinders, which are located just aft of the pilot’s rudder pedals.
Page 28 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL * NOTE * The graduations on the dipstick indicate the oil level in U.S. quarts below maximum capacity of the oil tank. The normal cold oil level is the Maximum Cold mark on the dipstick. The normal hot level is Maximum Hot mark on the dipstick.
Page 29 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL major oil companies that have been approved by Pratt and Whitney Canada. Service Bulletin 13001 will be revised periodically to include newly approved oils. Refer to Figure 2-8 for the locations called out in the following procedure.
Page 30 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL G. If an engine is to be operated with an oil brand or type that differs from that on which it previously operated or if the oil system has been contaminated by other than metallic matter, the oil system should be flushed by following the steps below.
Page 31: Fuel System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ** CAUTION ** Different formulations of the various oil brands may have varying detergent actions. After an oil brand change, the above may cause the release of carbon particles into the oil system which would result in the clogging of the scavenge screen.
Page 32 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL *** WARNING *** Ground the aircraft and the fuel servicing equipment to the aircraft. Smoking in or around the aircraft during refueling operations is prohibited. Fire protection equipment must be immediately available.
Page 33: Defueling
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL * NOTE * This reservoir should be emptied after each engine shutdown. * NOTE * It is common and normal after an engine compressor Water Wash or Performance Recovery Wash to have water or soap appear in the reservoirs’...
Page 34: Induction System
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL *** WARNING *** Smoking on or around the aircraft is not permitted during the defueling procedure. Fire protection equipment must immediately available. Ground aircraft and all defueling equipment or containers to the aircraft.
Page 35: Landing Gear, Wheels & Brakes
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LANDING GEAR, WHEELS & BRAKES Check all gear assemblies for general cleanliness, security of mounting, and hydraulic leaks at prescribed inspection intervals. Lubricate all lubrication points on main and tail gear assemblies at prescribed intervals.
Page 36 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Wiring is to be checked for security, chafing, burning, defective insulation, and loose or broken terminals, heat deterioration, and corroded terminals. Bolts in critical areas are to be checked for correct torque, or when visual inspection indicates the need for a torque check.
Page 37: Inspection Chart
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSPECTION CHART PROPELLER (Refer to Hartzell Manual #139 Propeller Owner’s Manual and Logbook.) Remove the spinner and check for cracks. 2. Check the back plate for cracks and corrosion. 3. Check for grease and oil leaks.
Page 38 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 10. Check counterweight bolts for safety. 11. Check ring rod-end jam nuts. 12. Re-install spinner. Rotate prop and check alignment of low pitch stop collar. (.010 max. runout) 13. Check carbon block side clearance. New Block: .001 ”-.002”...
Page 39: Engine Externals
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE EXTERNALS REFER TO THE ENGINES’ APPROPRIATE PRATT & WHITNEY MAINTENANCE MANUAL FOR PERTINENT DETAILS ON ENGINE INSPECTION Check the tubing, wiring, control linkages, and hose assemblies for security of all the accessible connections, clamps, and brackets.
Page 40: Engine Oil System
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Check the security of the accessories. INTENTIONALLY LEFT BLANK INTENTIONALLY LEFT BLANK Check the security of accessory linkages. Check the security of pneumatic lines. Check for evidence of oil and fuel leaks in accessory areas. Check security and mounting of starter/generator.
Page 41 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL * NOTE * To avoid overfilling of oil tank, and high oil consumption, an oil level check is recommended within 30 minutes after engine shutdown. Ideal interval is 15 to 20 minutes.
Page 42: Engine Fuel System
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE FUEL SYSTEM Check the fuel for presence of water. Check the fuel pump for security and fuel leakage. Inspect, clean and reinstall high pressure fuel pump 74-micron inlet fuel filter. * NOTE * On new aircraft, check the filter after each flight until there is no evidence of contamination.
Page 43: Ignition System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL IGNITION SYSTEM Daily Check the ignition exciter for security and condition. Check the ignition cable for chafing, wear, and security. Check the spark igniters for cleanliness and erosion. Perform an operation test.
Page 44: Main Landing Gear
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily Turn the electric fuel pump on and check the fuel lines for leaks. Inspect the fuel lines and supports for security and signs of chafing. Check the fuel shutoff valve for leaks in the open and close position.
Page 45: Tail Gear
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily Check, inspect, lubricate with MIL-G-81322 (Aeroshell 22) grease, and reassemble all wheel bearings. (See chapter 6 for pertinent data.) Check the master cylinders, parking brake valves, brake lines, brake calipers, all brake fittings, and brake bleeders for leakage, general condition, and security.
Page 46: Fuselage Skins
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily Check for any loose play in tail wheel. Inspect the tire, wheel body and bearings, spindle, and the fork for general condition. Check the housing for cracks and corrosion. Check the taper bearings and spline-shaft for corrosion and wear.
Page 47 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily Check the hopper lid for condition of seal and security of latches. Inspect the hopper for evidence of leaks and for general condition. Check the gate for evidence of leaks and for proper operation.
Page 48: Wings
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily WINGS Inspect the wing skins for cracks, loose rivets, general condition of the paint, and corrosion. Inspect the front and rear spar flanges, ribs, and other structures for cracks and corrosion. Check the spray booms attach points for security.
Page 49 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily INTENTIONALLY LEFT BLANK Inspect all cables and end fittings for wear. Check for correct tension. Check all push rods for loose bearings, endplay, straightness and paint condition. Check idlers and bellcranks for binding or for slack.
Page 50: Metal Empennage
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL METAL EMPENNAGE Daily Check the travel of the movable surfaces. Elevator up 27 degrees ±1 degree Elevator down 17 degrees ±1 degree Rudder 22 degrees ±1 degree Tab up 8 degrees ±1 degree Tab down 22 degrees ±1 degree Check for warped contours of the fixed surfaces due to...
Page 51: Ailerons And Flaps
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Daily AILERONS AND FLAPS Check the control movements. Aileron up 21 degrees ±1 degree Aileron down 17 degrees ±1 degree Flap down 15 degrees ±1 degree Check the security of the counterweights, which are installed in the leading edges of the ailerons.
Page 52: Cockpit
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL COCKPIT Daily Check the condition of the instrument markings and the placards. Check the instrument lines for leaks, security, and chafing. Check the hopper for leaks and security of mechanism. Check the security and condition of the seat belts, shoulder harness, and inertia reels.
Page 53 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INTENTIONALLY LEFT BLANK Daily Check battery relays, spike diodes, regulator, fuses, and switches for security. Check all wiring for chafing and clamping. Check all terminals for security and corrosion Check the battery’s vent hoses for security and deterioration.
Page 54: Airframe Maintenance
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL AIRFRAME MAINTENANCE CORROSION CONTROL The lower part of the aircraft is painted with ultra gloss polyurethane. The forward upper glareshield part is painted with flat black polyurethane. The fuselage frame is painted with a primer, and then painted with a gray ultrathane.
Page 55: Windshield
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL The forward fuselage and engine section should not be cleaned with water unless close attention is made to avoid removal of lubricants and to avoid possible rusting of components and hardware. A general purpose, non-corrosive cleaning agent is preferred in those areas.
Page 56: Lubrication
THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL and neutralizing or cleaning any spilled electrolyte or any corrosion. Use bicarbonate of soda and clean water to neutralize corrosion. Follow with a thorough flushing of clean water and wipe dry. Clean the cable and terminal connections with a wire brush and coat with petroleum jelly to minimize corrosion.
Page 57 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-1 2- 39 Effective: 12/17/03...
Page 58 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-2 2 - 40 Effective: 12/17/03...
Page 59 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-3 2- 41 Effective: 12/17/03...
Page 60 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-4 2 - 42 Effective: 12/17/03...
Page 61 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-5 2- 43 Effective: 12/17/03...
Page 62 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 1 of 8 2 - 44 Effective: 12/17/03...
Page 63 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 2 of 8 2- 45 Effective: 12/17/03...
Page 64 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 3 of 8 2 - 46 Effective: 12/17/03...
Page 65 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 4 of 8 2- 47 Effective: 12/17/03...
Page 66 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 5 of 8 2 - 48 Effective: 12/17/03...
Page 67 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 6 of 8 2- 49 Effective: 12/17/03...
Page 68 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 7 of 8 2 - 50 Effective: 12/17/03...
Page 69 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 2-6 Lubrication Chart Sheet 8 of 8 2 - 51 Effective: 12/17/03...
Page 70 THRUSH AICRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FINE THREAD SERIES BOLTS BOLTS Steel Tension Steel Tension AN 3 thru AN 20 MS 20004 thru MS 20024 AN 42 thru AN 49 NAS 144 thru NAS 158 AN 73 thru AN 81 NAS 333 thru NAS 340 AN 173 thru AN 186 NAS 583 thru NAS 590...
Page 71 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 2- 53 Effective: 12/17/03...
Page 72 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 3 HYDRAULICS TABLE OF CONTENTS SECTION THREE .............................1 HYDRAULICS ..............................1 HYDRAULIC SYSTEM ............................2 GENERAL DESCRIPTION ..........................2 3 - 1 3 - 1 Effective: 12/17/03 Effective: 12/17/03...
Page 73 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL HYDRAULIC SYSTEM SECTION THREE GENERAL DESCRIPTION The S2R-T660 aircraft has two individual hydraulic systems using MIL-H-5606 fluid. The main landing gear utilizes a master brake cylinder for the operation of the landing gear brakes and parking brakes.
Page 74 BETA & REVERSE LOCKOUT ......................32 FUEL SHUTOFF LOCKOUT ........................32 1600 RPM Np TORQUE SETTING ......................32 ENGINE DATA PERTINENT TO THRUSH AIRCRAFT INC INSTALLATION ........35 ENGINE LIMITS ............................35 PROPELLER DATA PERTINENT TO THRUSH AIRCRAFT INC INSTALLATION ....... 36 4 –...
Page 75: Powerplant And Propeller
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL POWERPLANT AND PROPELLER SECTION ONE GENERAL DESCRIPTION The Turbo Thrush agricultural airplane utilizes a Pratt & Whitney Aircraft Canada PT6A-45, PT6A- 60AG, PT6A-65AG, or PT6A-67AG turboprop gas turbine engines. AIR CLEANING SYSTEM The prime difference between the agricultural application and a normal installation is the air cleaning system incorporated in the engine air intake system.
Page 76 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL A row of stator vanes, located between each stage of compression, diffuses the air, raises its static pressure and directs it to the next stage of compression. The compressed air passes through diffuser tubes, which turn the air through ninety degrees in direction and convert velocity to static pressure.
Page 77: Engine Buildup
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL These components are driven by the compressor by means of a coupling shaft, which extends the drive through a tube at the center of the oil tank. The rear location of accessories provides for a clean engine and simplifies maintenance procedures.
Page 78 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ** CAUTION ** If the old engine is being removed because of oil contamination or of the possibility of oil contamination, scrap the following items: (a) oil cooler and (b) all oil carrying lines and hoses.
Page 79: Engine Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Remove the engine mounts from the old engine and install on the new engine, using the same bolts, washers, and gaskets. Torque the bolts to 250-325 inch pounds and secure with safety wire. Figure 4-8, #2...
Page 80 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Disconnect battery. Remove propeller. Remove exhaust ducts. Remove cannular inlet cover (3 places) from compressor inlet. Securely cover the engine compressor inlet screen to prevent entry of foreign material. Disconnect the following tube and hose assemblies at the locations noted:...
Page 81 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Fuel inlet manifold adaptor dump tube at front fireseal. Fuel inlet hose at the oil-to-fuel heater. Fuel purge hose at the high pressure fuel pump. Oil pressure line at engine.
Page 82 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Tq pressure transmitter (NOTE: This not installed on aircraft with direct reading Tq gauge.). * NOTE * After wiring harness has been removed from above items, remove the grommet at basket assembly aft. Close out and carefully pull the harness aft and clear of basket.
Page 83: Engine Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Disconnect the condition lever control push-pull tube rod end at the lever on the start control unit. Disconnect the power control cable rod end at the power-input lever. Remove engine mount cuffs at aft fireseal (8 locations).
Page 84 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Connect the following tube and hose assemblies at the locations noted: Oil cooler augmentation lines and hoses. Gas generator case front drain valve hose. Torque system lines at forward fireseal.
Page 85 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Np tach generator. Prop beta micro switch. Overspeed governor prop test solenoid (Be sure to install the two ground wires on the mounting stud.) ITT harness at the T5 terminal block.
Page 86: Propeller
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER DESCRIPTION AND OPERATION This section describes the function of the following: − Propeller and Beta Feedback Mechanism − Constant Speed Unit (CSU) − Propeller Overspeed Governor − Engine Power and Propeller Controls (FCU) −...
Page 87: Constant Speed Unit (Csu)
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL the beta nuts at a certain preset blade pitch. From that instant the propeller feedback ring (Fig. 4-1) moves forward with the servo-piston. As it moves, the reverse return springs (Fig. 4-1) are compressed.
Page 88 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL B. Constant Speed Section The constant speed section maintains constant propeller speed during takeoff, climb, and cruise by controlling the flow of servo-oil to and from the propeller servo-piston. A hollow drive shaft (Fig. 4-1) is driven by a bevel gear on the engine propeller shaft. On top of the drive shaft there are two rotating flyweights that pivot outward.
Page 89 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL propeller RPM will then decrease. As the propeller RPM reaches the selected speed, the speeder spring force pushes the pilot valve back to the "on speed" condition. C. Power Turbine Governing Section The Nf governor or fuel-topping governor of the power turbine governing section of the CSU has two functions in the propeller speed control.
Page 90 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL In this phase of the operation the fuel governor reset arm (Fig. 4-2, #13) is against the maximum stop. (Figure 4-2, #12) 5. During beta and reverse the pilot valve plunger is always in a lowered position.
Page 91: Propeller Overspeed Governor
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 2. The second function of the beta control valve is to enable direct control of the propeller blade angle in beta and reverse. After the hydraulic low pitch stop is reached, finer blade angles through flat pitch to reverse can be selected by the aircraft operator after landing.
Page 92 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Connected to the beta control cam (Fig. 4-3, #2) is the push-pull control cable which runs forward on the engine to connect to the top end of the propeller reversing lever (Fig.4-2, #2), via the fuel governor interconnection rod (Fig.
Page 93: Propeller Speed Select And Feathering Control
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER SPEED SELECT AND FEATHERING CONTROL The cockpit propeller lever has two functions: The first function is to select the propeller RPM in takeoff, climb, and cruise configurations. The second function is to feather the propeller when it is required.
Page 94: Propeller Maintenance
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER MAINTENANCE PROPELLER REMOVAL Remove the forward cowl from the engine. Remove the spinner dome by removing the attaching screws from around the rear circumference. Disconnect the front fork-end from the propeller-reversing lever. Disconnect the pivot bolt securing the reversing lever to the propeller governor actuating lever and lift the reversing lever free of the collar prior to pulling the low pitch stop collar fully forward.
Page 95: Propeller Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER INSTALLATION Place the new O-ring seal over the engine shaft. Pull the beta ring fully forward with the puller. ** CAUTION ** Make sure the tool is not cocked to avoid damaging the propeller.
Page 96 Perform the necessary engine run-up checks. * NOTE * Thrush Aircraft Inc. recommends that the propeller be dynamically balanced to the engine whenever a new propeller or an overhauled propeller is installed, or any time there is a question of the propeller's balance.
Page 97: Constant Speed Unit (Csu) Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL CONSTANT SPEED UNIT (CSU) REMOVAL Remove the forward engine cowling. Remove bolt that secures the propeller control cable to the governor's speed select lever. Remove the cotter pin, castellated nut, washer and bolt securing the Nf governor- interconnecting rod to the Nf governor reset arm.
Page 98: Propeller Csu High Rpm Adjustment
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ** CAUTION ** Ensure drive splines are completely engaged by checking that flange of governor rests squarely on gasket with no gap. Rotate propeller to assist engagement, if necessary. Position the governor on the mounting pad and secure it in place with the four attaching washers and nuts.
Page 99: Propeller Overspeed Governor Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER OVERSPEED GOVERNOR REMOVAL Remove the forward engines cowling. Remove the safety-wire and disconnect the electrical plug from the governor solenoid valve. Remove the four self-locking nuts and plain washers securing the governor and remove the governor from the left side of the reduction gear housing.
Page 100: Front Linkage
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ** CAUTION ** Never attempt to move the power lever into reverse with engine shutdown without first removing the pin at the rear clevis. (Refer to Figure 4-3, item #1)
Page 101 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Set condition lever (Fig. 4-3, #5) at LO-IDLE and install rig pin. This setting is a rigging datum point. Set FCU arm (Fig. 4-3, # 10) on FCU speed setting shaft (Fig. 4-7) maintaining an angle of 45 degrees as shown.
Page 102: Condition Lever Linkage
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Check that the deadband adjusting screw (Fig. 4-7) first contacts the stop at, or slightly forward of the idle detent and the adjusting screw begins to lift-off the stop at, or slightly aft of the ground idle detent.
Page 103: Engine Rigging Checks And Adjustments
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Upon completion of rigging and prior to engine running, a functional check of the system’s operation should be carried out. This check should include the operation of all controls throughout their entire operating range and checking for freedom of all movement, freedom binding, security and safety.
Page 104: Max Propeller Speed Check
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER GOVERNOR CHECK Set power lever to IDLE. Feather propeller. Ng should not change more than 100 RPM. MAX PROPELLER SPEED CHECK Set propeller control lever to obtain 100% Np or 1700 RPM Adjust MAX SPEED stop adjuster screw (10) as necessary.
Page 105: Beta & Reverse Lockout
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL GROUND OPERATION PROPELLER PITCH STOP Provides positive method to keep out of the propeller’s ground operation RPM restrictions. (NOTE: This stop is adjusted at the factory by controlling the length of the latch’s pawl and should not require field adjustment.
Page 106 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL *NOTE* It is not necessary to cap the bleed air line when checking the 1600 RPM torque setting Record the stabilized outside air temperature accurately and set the altimeter window to 29.92.
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Page 108: Engine Data Pertinent To Thrush Aircraft Inc Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE DATA PERTINENT TO THRUSH AIRCRAFT INC INSTALLATION -60AG 62.5% +1%, -0% NG Low (Ground) Idle -45 SERIES 59% ± 1% NG -67AG 59% ± 1% NG High (Flight) Flight Idle 69% Ng Fuel Boost Pump Pressure (Electric &...
Page 109: Propeller Data Pertinent To Thrush Aircraft Inc Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PROPELLER DATA PERTINENT TO THRUSH AIRCRAFT INC INSTALLATION For PT6A-45 and -60AG with HC-B5MP-3C/M10876AS or ANS propeller the following applies: 1170 to 1400 RPM Np is prohibited on Ground Stabilized operation below 900 RPM Np is prohibited – Except in feathered operation from 0 to 400 RPM Np.
Page 110 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL PT6A Engine Assembly Figure 4-0 4 – 37 Effective: 12/17/03...
Page 111 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-1 4 – 38 Effective: 12/17/03...
Page 112 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-2 4 – 39 Effective: 12/17/03...
Page 113 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-3 4 – 40 Effective: 12/17/03...
Page 114 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-4 4 – 41 Effective: 12/17/03...
Page 115 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TORQUE PRESSURE – PSI – AT 1600RPM PRESSURE ALTITUDE AND TEMPERATURE CONVERSION CHART FIGURE A Pressure Altitude Temp. (0 (Ft.) Degrees C) 2000 4000 6000 8000 Figure 4-5 4 – 42...
Page 116 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4 - 6 4 – 43 Effective: 12/17/03...
Page 117 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-7 4 – 44 Effective: 12/17/03...
Page 118 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 4-8 4 – 45 Effective: 12/17/03...
Page 119 THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 5 FUEL SYSTEM TABLE OF CONTENTS FUEL SYSTEM GENERAL DESCRIPTION ........................... 2 MAINTENANCE PRECAUTIONS ......................... 3 SUB-SYSTEMS AND COMPONENTS ......................3 FUEL QUANTITY INDICATING SYSTEM ....................3 FUEL QUANTITY INDICATOR ......................... 4 TRANSMITTER ............................
Page 120: General Description
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FUEL SYSTEM SECTION FIVE GENERAL DESCRIPTION A 230 U.S. gallon fuel supply is available for the Thrush S2R-T660. In each wing, fuel is contained inside integral wing tanks (wet wing fuel tanks) just outboard of the center section sub-wings. The left wing and right wing fuel tanks are interconnected through a 5 U.S.
Page 121: Maintenance Precautions
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL switch, adjacent to the fuel quantity indicator gauge on the instrument panel. The two fuel tanks are serviced through filler ports located on the top of both wings. The filler ports incorporate security chains to prevent the lost of the fuel caps.
Page 122: Fuel Quantity Indicator
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL vary the current flow through the indicating circuit. As the current flow varies, the needle on the fuel quantity indicator will indicate the level of fuel sensed by the fuel quantity transmitter.
Page 123: Calibration
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Calibration The fuel quantity transmitter and indicator have been calibrated at the factory and should not require recalibration. However, if for some reason the system requires recalibration, the electrical system should be carefully checked prior to recalibration. When necessary, the fuel quantity indicating system is calibrated as follows: Defuel aircraft as outlined in Section II.
Page 124: Auxiliary Electric Fuel Pump
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Turn off and disconnect APU. Turn battery OFF. Restore the fuel system to its original configuration. CAPACITY (U.S. GALLONS) EMPTY 1/2 FULL 40 (-3, +5) 82 (-0, +8) 1 Gallon...
Page 125: Engine-Driven Fuel Pump
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE-DRIVEN FUEL PUMP The engine-driven fuel pump installed on the lower right rear portion of the engine is provided with a relief valve that will allow fuel to pass through from the airframe pump to the engine in the event of pump failure.
Page 126: Optional: Fuel Flow
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Seal central tube opening of filter element with suitable size rubber plug, to keep inside of filter element from getting contaminated during the cleaning process. Gently clean filter element by rinsing in new/unused solvent (Safty-kleen SK-105, Varsol, MIL-PRK-680 Type II, Odorless mineral spirits or equivalent) and blowing debris off surfaces using a low- pressure (up to 30 PSI Max) clean compressed air source.\...
Page 127: Fuel Line Maintenance
PR-1750 class A & B. For fast set up times (20 minutes application life and cure time) “Quick Set” CS-3204 B1/4 or PR-1435 may be used as a alternate sealer anywhere on the aircraft. CS 3600 (Mil-S-4383C) is used by Thrush Aircraft Inc as a topcoat for all the above listed polysulfide 5 -9...
Page 128: Leak Sealing
Semco® model 250 pneumatic or model 850 hand operated application gun. Thrush Aircraft Inc factory uses the following nozzles: Semco® model Nos. 252 (2.5”, 1/16” orifice), 410 (4”, 1/32” orifice), or 440 (4”, 1/8” orifice). The plastic nozzle tip can be cut with a razor knife to enlarge or modify the tips orifice size and shape to control the size and shape of the material bead.
Page 129: Resealing After Complete Skin Removal
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL RESEALING AFTER COMPLETE SKIN REMOVAL To reseal the fuel tanks after removing or repairing the wing skin, proceed as follows: Prior to installing the wing tank skin, all surfaces that will receive sealant shall be cleaned and etched.
Page 130: Fuel System Trouble Shooting Chart
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FUEL SYSTEM TROUBLE SHOOTING CHART TROUBLE PROBABLE CAUSE Check fuel quantity. Service No fuel quantity indication. Fuel tanks empty. with proper grade and amount of fuel. Check visually. If not open,...
Page 131 THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE Check connections and wiring. Loose connections or open Tighten connections; repair or circuit. replace wiring. Left and right fuel quantity Check continuity and replace if indicator switch defective.
Page 132 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE Fuel line disconnected or Inspect fuel lines. Connect or broken. repair fuel lines. Disconnect fuel lines from tank outlets. No fuel indicates Header tank outlet fuel plugged strainers. Remove strainers plugged.
Page 133 THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Pressure check each vent line. Fuel vents plugged. Clean or replace vent line. No fuel flow when auxiliary Defective electric auxiliary Check continuity of switch. pump is turned on.
Page 134: Activating Hopper (Ferry) Fuel System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Check voltage and ground wire. If voltage is present and Fuel flow indicator No voltage to indicator. ground is good, replace inoperable. indicator, maintaining the same K factor.
Page 135: Operating Instructions For The P/N 60167 Ferry Fuel System
THRUSH AIRCRAFT INC – T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Install cap on hopper outlet fitting and lockwire. Hook up fuel line from cap to fuel selector valve. Make sure that the fuel line is secured to aircraft structure and will not foul any moveable controls.
Page 136 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Important Note: with the ferry fuel selector in hopper position, drain all trapped air from the hopper fuel line by operating the fuel filter drain located on L/H shin skin forward of firewall (see Fig. 5-1). Unless this procedure is followed after each refueling, the engine may flameout when hopper fuel is selected in flight.
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Page 138 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 5-2 5 -20 Effective: 12/17/03...
Page 139 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 6 LANDING GEAR, WHEELS & BRAKES TABLE OF CONTENTS LANDING GEAR, WHEELS & BRAKES ....................... 1 LANDING GEAR, WHEELS AND BRAKES ...................... 2 GENERAL DESCRIPTION ..........................2 MAIN LANDING GEAR REMOVAL ........................2 CLEANING, INSPECTION AND REPAIR OF MAIN GEAR ................
Page 140: Landing Gear, Wheels And Brakes
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LANDING GEAR, WHEELS AND BRAKES SECTION SIX GENERAL DESCRIPTION The main landing gear consists of two interchangeable spring steel gear assemblies and two wheel and brake assemblies. A common center beam supports each gear half. A dowel pin and clamp is used to hold the gear in place.
Page 141: Tail Landing Gear
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Check all welds for cracks at fuselage support brackets. Repair of the landing gear is limited to reconditioning of parts, such as replacing components, bearings and bushings, smoothing out minor nicks and scratches and repainting areas where paint has chipped or peeled.
Page 142: Disassembly Of Spindle Housing Assembly
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Inspect spindle housing assembly welds for cracks. Inspect spindle housing assembly for cracks and corrosion. Inspect lock pin and upper and lower lock plates for wear, corrosion, cracks, and proper operation.
Page 143: Tail Gear Rigging
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL For spindle castellated nut: While manually rotating spindle, torque spindle castellated nut to 20 inch- pounds, continue rotating spindle and back off to zero inch-pounds. While manually rotating spindle, torque nut to 10 inch pounds. If not in locking position, advance nut to next position, not to exceed 30º, and install cotter pin.
Page 144: Inspection Of Tail Wheel Assembly
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSPECTION OF TAIL WHEEL ASSEMBLY Visually check all parts for cracks, corrosion, distortion, defects and excessive wear. Inspect felt grease seals. Replace if surface is hard or contaminated, or shows evidence of excessive wear.
Page 145 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL * NOTE * Tires and tubes are balanced as individual units and marked at time of manufacture. The tire balance mark is a red dot. The tube balance mark is a yellow stripe on the base of the tube.
Page 146: Wheels And Brakes
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL WHEELS AND BRAKES GENERAL DESCRIPTION The divided type wheels (including tail wheel) are machined castings, consisting of two sections called wheel halves. The wheel halves, which are secured together by bolts and nuts, are interchangeable, and the complete wheel assemblies are interchangeable according to wheel size.
Page 147: Inspection Of Main Wheel Assembly
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL * NOTE * Wheel halves can be replaced individually. Wheel sets no longer have to be replaced as match pairs. INSPECTION OF MAIN WHEEL ASSEMBLY (Cleveland, Divided Type) Clean all parts in cleaning solvent and dry thoroughly. A soft bristle brush may be used to remove hardened grease, dust or dirt.
Page 148: Reassembly And Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL When replacing a bearing cup, repeat step 1., and chill bearing cup in dry ice for a minimum of 15 minutes. Remove wheel half from source of heat and bearing cup from the dry ice.
Page 149: Measuring Brake Lining Wear
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Inflate tube until beads seat on wheel flanges. Remove valves core and allow tube to deflate. Install valves core and inflate tires from 40 to 60 psi. Check to assure valve stem does not leak before installing valve cap.
Page 150: Reassembly Of Metallic Linings To Caliper
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Inspect pressure plate and back plates for excessive warping. Straighten pressure plate too less than 0.010” flatness. Check lining attachment pins for mushroomed heads or other visible damage. Damaged pins may be replaced by carefully drilling out the pins (refer to Fig. 6-3).
Page 151: Brake Lining Conditioning Procedures
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Slide back plates between brake disc and wheel/tire and install back plate attachment bolts and washers into back plates. Torque brake assembly back plate tie bolts to 60 inch/pounds. Two different types of back plate tie bolts are used.
Page 152: Brake Removal And Disassembly
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL This conditioning procedure will wear off high spots and generate sufficient heat to create a thin layer of glazed material at the lining friction surface. Normal brake usage should generate enough heat to maintain the glaze throughout the life of the lining.
Page 153: Brake Reassembly And Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL and outlet hydraulic ports for foreign contaminates. Examine cylinder walls for scoring or excessive wear. Blend and polish light scratches in piston cavities with fine emery cloth, 600 grit. Castings that are cracked or have damaged threads should be replaced.
Page 154: Removal Of Brake Master Cylinders
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Lubricate large O-ring with MIL-H-5606 hydraulic fluid and install in groove in brake housing bore area. Install piston assembly in brake housing. Install pressure plate assembly on anchor bolts. Install brake assembly to torque plate.
Page 155 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Place free end of hose in a clean glass receptacle containing enough hydraulic fluid to cover end of hose. End of bleeder hose must be submerged at all times to properly check for air bubbles and prevent entry of air into hydraulic system.
Page 156: Troubleshooting Chart
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLESHOOTING CHART PROBABLE CAUSE REMEDY TROUBLE Jack tail, remove wheel and inspect bearings. Replace Tail wheel shimmy. Worn or loose wheel bearings. with new lubricated bearing if necessary. Jack tail and remove tire for Tire imbalance.
Page 157 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Have someone apply and then release brakes. Wheel should rotate freely as soon as brake is released. If wheel fails to rotate freely, loosen brake line at brake housing to relieve any pressure trapped in line.
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Page 159 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 6-1a 6 -19a Effective: 01/10/05...
Page 160 Figure 6-2 6 -20 Effective: 09/02/04...
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Page 163 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 6-5 6 -23 Effective: 12/17/03...
Page 164 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 7 FLIGHT CONTROLS TABLE OF CONTENTS FLIGHT CONTROLS ............................1 GENERAL DESCRIPTION........................... 2 MAINTENANCE OF FLIGHT CONTROLS ....................2 FLIGHT CONTROL SYSTEMS........................3 CONTROL STICK............................. 3 REMOVAL OF BEARINGS FROM CONTROL STICK, FORK AND TORQUE TUBE ......3 BEARING INSTALLATION IN THE CONTROL STICK FORK AND ON THE TORQUE TUBE ....
Page 165: Flight Controls
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FLIGHT CONTROLS SECTION SEVEN GENERAL DESCRIPTION The aircraft is equipped with flight control surfaces consisting of ailerons, elevators, rudder, wing flaps, elevator tabs, rudder trim tabs and aileron trim tabs. The ailerons and flaps are an all-metal construction.
Page 166: Flight Control Systems
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL requirement. The following procedures should be followed when rigging control cables. Rigging should be accomplished in a hangar. When necessary to rig aircraft in the open, it should be accomplished during coolest part of the day with tail of the aircraft pointing toward sun. If aircraft is moved into a hangar for rigging, allow 90 minutes for control cables to adjust to hangar temperature.
Page 167: Ailerons
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL AILERONS An all-metal aileron is installed outboard of each wing flap. Each aileron operates on bearing hinges and is attached to the aft wing spar at three points. One balance weight is installed in the outboard leading edge of each aileron to prevent flutter.
Page 168: Wing Flaps
Adjusting the tab up will correct a low wing attitude. Electric Aileron Trim Tabs. Thrush Aircraft Inc has made available an electric aileron trim tab normally installed on left aileron. Initially, the tab is rigged the same as servo-trim tabs, then the tab can be electrically adjusted to obtain level flight.
Page 169: Flap Jackscrew Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL stainless steel hinges. A switch located on the aft of the throttle quadrant electrically controls the flap operation. Movement of the flaps is by a torque tube located below the cockpit floor and rotated by an electric motor-driven jackscrew.
Page 170: Flap Rigging
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FLAP RIGGING With the master switch “ON,” fully retract the flaps (up flaps) with the flap switch. Disconnect the flap push – pull rods at the torque tube arms. Hold a straight edge on the wing lower surface at wing station 49.0 (approximately 24 inches outboard of the fuselage side).
Page 171: Rudder Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Remove attaching hardware from rudder hinge points. Remove the rudder from the aircraft. RUDDER INSTALLATION Place rudder on hinge points. Install the hardware in the hinge. Attach rudder cables to rudder horn.
Page 172: Rudder Electric Trim Tab
22 (±1) degrees left and right of center. (Fig. 7-8) RUDDER ELECTRIC TRIM TAB (Fig. 7-10) Thrush Aircraft Inc has an electric rudder trim unit that replaces the fixed position trim tab and is rigged to obtain straight flight; then it can be electrically adjusted to maintain straight flight.
Page 173: Balance Cable Rigging
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL *NOTE * Rerigging should not be necessary as long as no rods have to be changed. However, a test of the unit's operation should be carried out. BALANCE CABLE RIGGING (Fig. 7-11) The Thrush incorporates a rudder-aileron balance cable/spring system.
Page 174: Elevator Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ELEVATOR REMOVAL Disconnect aft push tube from elevator horns. Disconnect the trim tab push rod at elevator trim-tab. Remove hardware attaching both of the elevators horns together. Remove all hinge bolts from leading edge of elevator.
Page 175: Elevator Trim Tabs
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Set the elevator at the full UP travel of 27 (±1) degrees and adjust the aft stop on the control stick to match this position. Tighten the lock nut against the rod end bearing at the elevator horn.
Page 176: Empennage
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL EMPENNAGE The vertical stabilizer, rudder, horizontal stabilizer and elevators are constructed of Alclad aluminum. All stabilizers are connected to the fuselage structure by bolts and supported by adjustable struts. Rudder and elevators are attached to the stabilizers by hinges containing sealed bearings.
Page 177: Wing Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL trimmed to fit if needed and drilled with a .312 (5/16") drill bit and bolted into place using AN5-6A bolts. If only re-torque is required and torque cannot be achieved with old shims, the replacement of the copper crush washer only should be sufficient to regain correct torque and proper angle for alignment.
Page 178: Center Section Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL CENTER SECTION REMOVAL Support center section. Remove fuselage skins and fairings to gain access to center section support areas. Disconnect electrical wires, fuel lines, vents and control tubes. Remove attach bolts from attach angles to wing and remove attach angles and rear bolt. (Fig. 7-15 or 7-17) Remove the angle and link from lower fuselage longeron and leading edge support strap.
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Page 180: Troubleshooting Chart
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLESHOOTING CHART AILERON SYSTEM TROUBLE CAUSE REMEDY Check control stick Resistance to control stick Control stick bearings dry or bearings for movement. worn. lubrication, excessive wear and cleanliness. Check bearing for...
Page 181: Flap System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FLAP SYSTEM TROUBLE CAUSE REMEDY Flaps do not extend (down) or Circuit breaker out. Reset circuit breaker. retract (up). Defective flap switch. Replace flap switch. Defective flap motor. Replace flap motor.
Page 182: Rudder System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE CAUSE REMEDY Bent push rods. Straighten or replace. Bent flap. Repair or replace flap. Flaps on one side fail to Broken arm on torque tube or Replace broken parts.
Page 183 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE CAUSE REMEDY Adjust cables in Excessive resistance to Cables too tight. accordance with rigging rudder pedal movement. procedures. Provide proper clearance if pulleys are rubbing Pulleys binding or rubbing.
Page 184: Elevator Control System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ELEVATOR CONTROL SYSTEM TROUBLE CAUSE REMEDY Provide proper Resistance to control stick clearance if rubbing Pulley binding or rubbing. movement. pulley bracket or guard. Lubricate bearings. Binding control stick bearings.
Page 185: Elevator Trim Control System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ELEVATOR TRIM CONTROL SYSTEM TROUBLE CAUSE REMEDY Check push rods at Trim control lever moves with fairings for free Push rods binding. excessive resistance. movement. Lubricate hinge. If Trim tab hinge binding.
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Page 187 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-2 7 - 24 Effective: 12/17/04...
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Page 191 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-6 7 - 28 Effective: 12/17/04...
Page 192 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-7 7 - 29 Effective: 01/10/05...
Page 193 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-8 7 - 30 Effective: 12/17/04...
Page 194 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-9 7 - 31 Effective: 01/10/05...
Page 195 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-10 7 - 32 Effective: 12/17/04...
Page 196 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-11 7 - 33 Effective: 01/10/05...
Page 197 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-12 7 - 34 Effective: 12/17/04...
Page 198 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-13 7 - 35 Effective: 01/10/05...
Page 199 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 7 - 36 Effective: 12/17/04...
Page 200 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-15 7 - 37 Effective: 01/10/05...
Page 201 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-16 7 - 38 Effective: 12/17/04...
Page 202 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-17 7 - 39 Effective: 01/10/05...
Page 203 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 7-18 7 - 40 Effective: 12/17/04...
Page 204 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FLIGHT CONTROL STATIC BALANCE LIMITS After repaint or repair of balanced control surfaces, they must be checked for proper balance using the limits found in the charts below. Stripping of paint and repainting may be necessary if control fails to be within limits.
Page 205 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 8 INSTRUMENTS TABLE OF CONTENTS INSTRUMENTS ..............................2 GENERAL DESCRIPTION ........................2 INSTRUMENT SYSTEM MAINTENANCE ....................2 FLIGHT INSTRUMENTS ...........................3 PITOT-STATIC SYSTEM ...........................3 MAINTENANCE ............................3 INSPECTION AND LEAKAGE TEST ......................3 ALTI METER ..............................5 AIRSPEED INDICATOR ..........................5...
Page 206: Instruments
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSTRUMENTS SECTION EIGHT GENERAL DESCRIPTION The standard instruments are located on three panels in the cockpit. An upper panel, a left lower panel, and a right lower panel. The left lower panel contains a clock, oil temperature gauge, oil pressure gauge, fuel pressure gauge, air filter Delta “P”...
Page 207: Flight Instruments
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL FLIGHT INSTRUMENTS Flight instruments consist of the magnetic compass, airspeed indicator, altimeter and bank indicator. The pitot- static system provides pitot (impact) and static (atmospheric) air pressure to the airspeed indicator and static air pressure to the altimeter indicator.
Page 208 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Attach a source of suction to static pressure source opening. Slowly apply suction until altimeter indicates a 1000-foot increase in altitude. ** CAUTION ** When applying or releasing suction, do not exceed the range of the vertical speed indicator or airspeed indicator.
Page 209: Altimeter
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ** CAUTION ** Do not apply positive pressure with the airspeed indicator connected to the static pressure system. Slowly apply positive pressure until altimeter indicates a 1000-foot decrease in altitude and maintain this altimeter indication while checking for leaks.
Page 210: Magnetic Compass Compensation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL panel, is internally lighted, and is equipped with compensating magnets that are adjustable from the front of the case. Covers on the face of the compass allow access to adjust the compensating magnets. The compass should be swung and compensated at regular intervals and at any time equipment installations are made that could cause compass deviation.
Page 211: Power Plant Instruments
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL POWER PLANT INSTRUMENTS This group consists of the oil temperature gauge, oil pressure and fuel pressure gauge, ITT indicator, torque indicator, propeller RPM indicator, percent gas generator speed indicator, and fuel quantity indicator. These...
Page 212: Hopper Quantity
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL charge side unless there is an aircraft generator malfunction, or if the electrical load demand exceeds the aircraft generator output, the ammeter will indicate the discharge side. Continuous operation on the discharge side will be detrimental to battery life and may cause loss of electrical power.
Page 213 Pot 2 labeled set point 2. The amber and red lights can be set at any position you may desire. Thrush Aircraft Inc recommends setting the amber light to come on at 25 gallons, or 8 3/8" from top of lower stop collar to bottom of floating ball, and the red light to come on at 6 1/2 gallons, or 2 1/2"...
Page 214 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Test line and connection Pitot pressure connection not for leaks. Repair or Hand fails to respond...
Page 215: Altimeter
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ALTIMETER TROUBLE PROBABLE CAUSE REMEDY Check line for obstructions. Check static source. Blow out Instrument fails to Static line plugged. lines. Clean static source. operate. Substitute known-good altimeter Defective mechanism.
Page 216 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Compare reading with known- Pointers out of calibration. good altimeter. Replace instrument. Check lines for obstructions or leaks. Check static source. Hands oscillate. Static pressure irregular.
Page 217: Magnetic Compass
MAGNETIC COMPASS TROUBLE PROBABLE CAUSE REMEDY Compass not properly Swing compass and Excessive card error compensated compensate. External magnetic Locate and eliminate interference interference. Excessive card oscillation Insufficient liquid Replace compass. Excessive vibration of Remove cause of vibration. compass 8 – 13 Effective: 12/17/03...
Page 218: Engine Oil Pressure Gauge
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Back compensating screws off to Compass excessively Card element not level, sluggish remove all compensation, then compensated recompensate compass. Leaking float chamber due to broken cover glass or case, or defective sealing gaskets, weak.
Page 219 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Check line for obstructions. Clean Gauge does not register Pressure line clogged line. Check line for leaks and damage. Repair or Leak in pressure line replace damaged line.
Page 220: Engine Fuel Pressure Gauge
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE FUEL PRESSURE GAUGE TROUBLE PROBABLE CAUSE REMEDY Clear and clean line. Gauge inoperative or erratic. Tighten fittings or Restricted, broken or leaking line Low pressure or flow registered. replace, if necessary.
Page 221: Tachometer
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TACHOMETER TROUBLE PROBABLE CAUSE REMEDY Test generator for output. Overhaul or Tachometer registers low, Tachometer replace if necessary. erratically, or no reading. generator/tachometer defective Test instrument and replace, if necessary.
Page 222 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMEDY Check for partial ground between Grounded wire. (Pointer stays transmitter and above F). indicator. Repair or replace defective wire. Check voltage at indicator. Correct Low voltage voltage.
Page 223: Engine Oil Temperature Gauge
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ENGINE OIL TEMPERATURE GAUGE TROUBLE PROBABLE CAUSE REMEDY Replace instrument or Gauge has erratic operation Defective indicator or transmitter transmitter. Check for partial ground between transmitter and Grounded wire indicator. Repair or replace defective wire.
Page 224: Hopper Quantity System
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL HOPPER QUANTITY SYSTEM TROUBLE PROBABLE CAUSE REMEDY Disconnect wires and check No indication on indicator Bad sensing element resistance. Refer to Fig. 8- Resistance check bad. Replace element (non- repairable).
Page 225 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSTRUMENT MARKINGS – PT6A-60AG UNIT RANGE DEPICTION MEANING Oil Temperature ( Red Radial MINIMUM ° -40 to 0 Yellow Arc CAUTION 0 to 110 Green Arc NORMAL Red Radial MAXIMUM...
Page 226 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSTRUMENT MARKINGS - PT6A-45 SERIES UNIT RANGE DEPICTION MEANING Red Radial MINIMUM Oil Temperature ( ° -40 to 0 Yellow Arc CAUTION 0 to 99 Green Arc NORMAL Red Radial...
Page 227 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL THIS P A G E I N T E N T I O N A L L Y L E F T B L A N K 8 – 23...
Page 228 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSTRUMENT MARKINGS - PT6A-67AG UNIT RANGE DEPICTION MEANING Red Radial MINIMUM Oil Temperature ( ° -40 to 0 Yellow Arc CAUTION 0 to 110 Green Arc NORMAL Red Radial MAXIMUM...
Page 229: Instrument Markings
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL INSTRUMENT MARKINGS PT6A-60AG, -67AG and –45 Series Engines UNIT RANGE DEPICTION MEANING Propeller RPM 0 to 1700 Green Arc NORMAL 1700 Red Radial MAXIMUM Gas Generator Speed (%) 56 to 104...
Page 230 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL LEVEL SENSING UNIT BLUE BLACK WIRES COMING FROM TUBE BROWN APPROXIMATE RESISTANCE WITH FLOAT IN CENTER OF TUBE BLACK 3000 – 5000 OHMS BLUE BLACK 2000 – 3000 OHMS BROWN...
Page 231 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 9 DISPERSAL SYSTEMS TABLE OF CONTENTS DISPERSAL SYSTEMS ...........................2 GENERAL DESCRIPTION ...........................2 HOPPER ..............................3 HOPPER CARE ............................3 HOPPER REPAIR ............................3 HOPPER GATE BOX REMOVAL ......................4 HOPPER GATE BOX INSTALLATION ......................4 HOPPER ADAPTER BOX REMOVAL .......................5...
Page 232: General Description
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL DISPERSAL SYSTEMS SECTION NINE GENERAL DESCRIPTION A 660 gallon reinforced fiberglass hopper is the principal part of both the solid and spray units. The hopper top forms the cowling from the cockpit forward to the firewall. The hopper gate box is designed to be liquid as well as dust tight.
Page 233: Hopper
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL HOPPER (Figure 9-2) HOPPER CARE Regardless of the materials used in the construction or coating of the hopper, it should be thoroughly washed after each day’s work. Use cold, clean water and any domestic detergent.
Page 234: Hopper Gate Box Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Curing temperature is 70 F minimum. Higher temperatures accelerate curing. A maximum ° of 150 F for four hours is recommended followed by ten or more hours at 70 °...
Page 235: Hopper Adapter Box Removal
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL HOPPER ADAPTER BOX REMOVAL (Figure 9-4) Remove side loader tube and hopper vent tube. Remove all bolts that attach adapter box to forward and rear hopper throats. Pry the adapter box from the hopper to release the grip created by the sealer used during assembly.
Page 236 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Refer to manufacturer's data for pump lubrication. Inspect emergency on/off control and valve for security and proper operation. Inspect 3-way pressure control valve for security and proper operation. Inspect both booms and the support for each boom for security and evidence of corrosion.
Page 237 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 9-1 9 – 7 Effective: 12/17/03...
Page 238 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 9-2 9 - 8 Effective: 12/17/03...
Page 239 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 9-3 9 – 9 Effective: 12/17/03...
Page 240 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 9-4 9 - 10 Effective: 12/17/03...
Page 241 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL 9 – 11 Effective: 12/17/03...
Page 242 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 9-6 9 - 12 Effective: 12/17/03...
Page 243 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 10 ELECTRICAL SYSTEM TABLE OF CONTENTS ELECTRICAL SYSTEM ............................2 GENERAL DESCRIPTION ...........................2 POWER DISTRIBUTION ...........................2 BATTERY AND EXTERNAL POWER .......................2 BATTERY SERVICING ..........................2 SERVICING BATTERY INSTALLED IN AIRCRAFT .................4 GENERATOR SYSTEM ..........................4...
Page 244: General Description
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL ELECTRICAL SYSTEM SECTION TEN GENERAL DESCRIPTION The aircraft 24-volt DC electrical system is designed to provide the utmost in reliability. Two 24-volt storage batteries provide electric current for engine starting and a reserve source of electrical power in the event of generator failure.
Page 245 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Fill each cell with 1.285 specific gravity sulfuric acid to bottom of split ring. Use only glass, rubber or plastic materials for containing battery electrolyte fluid during servicing and wear protective clothing and rubber gloves when handling electrolyte to prevent personal injury.
Page 246: Servicing Battery Installed In Aircraft
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL SERVICING BATTERY INSTALLED IN AIRCRAFT The 24-volt battery is installed aft of the engine on the engine mount lower longerons and is accessible through the removable cowling skins. Check the battery electrolyte level frequently, especially during hot weather.
Page 247: Battery Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Remove R.H. aft cowl skin. Disconnect the quick disconnect from the battery and remove all safety wire. Disconnect vent tubes. Remove nuts from battery hold down rods and remove batteries from compartment.
Page 248: Starter - Generator Maintenance
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL equivalent.. Place the voltage regulator into position and snap it to the regulator base with the retaining clips. Connect the battery. After installing, re-check voltage regulator for 27.5 VDC with engine running and normal systems operating.
Page 249: Starter-Generator Installation
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL STARTER-GENERATOR INSTALLATION Verify that the battery switch is OFF and that external power is disconnected. Disconnect batteries. Install new “0” ring on starter-generator drive shaft. Lubricate “wet-type” splines with engine oil.
Page 250: Troubleshooting Chart
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLESHOOTING CHART BATTERY SYSTEM TROUBLE PROBABLE CAUSE REMARKS Battery fails to hold charge Battery defective Replace battery Check voltage regulator Battery will not come up to Charging rate to low and adjust to 27.5+ .2...
Page 251 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMARKS Adjust voltage regulator Charging rate too high to 27.5 INTENTIONALLY LEFT BLANK No power indicated with Battery discharged, defective Check battery, recharge battery switch on or disconnected...
Page 252: Starter/Generator - Generator Phase
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL STARTER/GENERATOR - GENERATOR PHASE TROUBLE PROBABLE CAUSE REMARKS Check connections Zero or low voltage indicated Loose connection throughout system Test resistance of field. Check field circuit Open or shorted field circuit connections.
Page 253 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMARKS Defective voltage regulator Adjust or replace circuit regulator Generator circuit breaker Check for short circuit and No generator output tripped or 130 amp buss limit reset circuit breaker and /...
Page 254: Starter/Generator - Starter Phase
THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL STARTER/GENERATOR - STARTER PHASE TROUBLE PROBABLE CAUSE REMARKS Check for short circuit Starter inoperative Circuit breaker tripped and reset circuit breaker Check battery. Service Low battery and recharge as necessary...
Page 255 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL TROUBLE PROBABLE CAUSE REMARKS Check battery. Service and recharge if Starter produces low Ng Low battery necessary Check resistance of each connection. Maximum resistance at any connection is 0.001 ohm.
Page 256 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-1 Standard Equipment Flap System Wiring 10 - 14 Effective: 12/17/03...
Page 257 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-2 Standard Equipment Fuel Quantity 10 - 15 Effective: 12/17/03...
Page 258 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-3 Standard Equipment Hour Meter 10 - 16 Effective: 12/17/03...
Page 259 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-4 Standard Equipment Low Oil Light & Stall Warning 10 - 17 Effective: 12/17/03...
Page 260 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-5 Standard Equipment Rudder Trim 10 - 18 Effective: 12/17/03...
Page 261 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-6 Standard Equipment Windshield Washer/Wiper 10 - 19 Effective: 12/17/03...
Page 262 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-7 Standard Equipment Strobe Lights 10 - 20 Effective: 12/17/03...
Page 263 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-8a Standard Equipment Navigation & Instrument Lighting 10 - 21 Effective: 12/17/03...
Page 264 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-8b Standard Equipment Navigation & Instrument Lighting 10 - 22 Effective: 12/17/03...
Page 265 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-9 Engine / Pratt & Whitney Beta & Chip Detector 10 - 23 Effective: 12/17/03...
Page 266 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-10 Engine / Pratt & Whitney Aux Fuel Pump, Igniters & Prop Test 10 - 24 Effective: 12/17/03...
Page 267 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-11 Engine / Pratt & Whitney 10 - 25 Effective: 12/17/03...
Page 268 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-12 Engine / Pratt & Whitney Power Distribution 10 - 26 Effective: 12/17/03...
Page 269 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-13 Quick Disconnect 10 - 27 Effective: 12/17/03...
Page 270 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-14 Quick Disconnect 10 - 28 Effective: 12/17/03...
Page 271 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-15 Quick Disconnect 10 - 29 Effective: 12/17/03...
Page 272 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-16 Quick Disconnect 10 - 30 Effective: 12/17/03...
Page 273 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-17 Quick Disconnect 10 - 31 Effective: 12/17/03...
Page 274 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-18 Quick Disconnect 10 - 32 Effective: 12/17/03...
Page 275 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-17 Quick Disconnect 10 - 33 Effective: 12/17/03...
Page 276 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-18 Quick Disconnect 10 - 34 Effective: 12/17/03...
Page 277 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-19 Quick Disconnect 10 - 35 Effective: 12/17/03...
Page 278 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-20 Quick Disconnect 10 - 36 Effective: 12/17/03...
Page 279 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-21 Quick Disconnect...
Page 280 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-22 Quick Disconnect 10 - 38 Effective: 12/17/03...
Page 281 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-23 Quick Disconnect 10 - 39 Effective: 12/17/03...
Page 282 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-25 10 - 40 Effective: 12/17/03 Quick Disconnect...
Page 283 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-26a Quick Disconnect Wire Harness Routing 10 - 41 Effective: 12/17/03...
Page 284 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-26b Quick Disconnect Wire Harness Routing 10 - 42 Effective: 12/17/03...
Page 285 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-27 Optional Auto Flagger 10 - 43 Effective: 12/17/03...
Page 286 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-28 Optional Boom Pressure, Turn & Bank, DG 10 - 44 Effective: 12/17/03...
Page 287 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-29 Optional Low Voltage Light, D.G. & Artificial Horizon 10 - 45 Effective: 12/17/03...
Page 288 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-30 Optional Smoker & Map Light 10 - 46 Effective: 12/17/03...
Page 289 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-31 Optional Zee Air Conditioner 10 - 47 Effective: 12/17/03...
Page 290 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-32 Optional Hopper Rinse & Pitot Heat 10 - 48 Effective: 12/17/03...
Page 291 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-33 Optional Micronair Flowmeter, Hopper Light & Agitator 10 - 49 Effective: 12/17/03...
Page 292 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-34 Optional Avionics Buss 10 - 50 Effective: 12/17/03...
Page 293 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-35 Optional Electric Fan Brake & Crop Hawk 10 - 51 Effective: 12/17/03...
Page 294 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-36 Optional Hopper Quantity & Fuel Flow 10 - 52 Effective: 12/17/03...
Page 295 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-37 Optional Hi Capacity Windshield Washer 10 - 53 Effective: 12/17/03...
Page 296 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-38 Optional Night Working Light Control 10 - 54 Effective: 12/17/03...
Page 297 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-39a Optional Night Working Lights 10 - 55 Effective: 12/17/03...
Page 298 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Figure 10-39b Optional Night Working Lights 10 - 56 Effective: 12/17/03...
Page 299 THRUSH AIRCRAFT INC - T660 TURBO THRUSH AIRCRAFT MAINTENANCE MANUAL Section 11 AIRWORTHINESS LIMITATIONS TABLE OF CONTENTS AIRWORTHINESS LIMITATIONS ........................2 GENERAL INFORMATION ...........................2 STRUCTURAL LIMITATIONS ........................2 11 - 1 Effective: 12/17/03...

Thrush Aircraft S2R–T660 Maintenance Manual

Section 1

Section 2

Section 4

Section 5

Section 6 Landing Gear, Wheels & Brakes

Section 7

Section 8 Instruments

Section 9

Section 10

Quick Links

Chapters

Troubleshooting

Related Manuals for Thrush Aircraft S2R–T660

Summary of Contents for Thrush Aircraft S2R–T660

Table of Contents