B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
R External Power 71-13-00-010-040 Opening of the Fan Cowl Doors 71-73-49-000-049 Removal of the Reservoir to Manifold Hydraulic Oil
Drain Tube 73-11-10-000-004 Removal of the Fuel Filter Element 73-11-10-210-003 Visual Inspection of the Fuel Filter Cartridge 73-11-10-620-002 Preservation of the Fuel Pump and Filter Assembly 73-11-20-000-002 Removal of the Servo Fuel Heater 73-11-49-000-041 Removal of the Fuel Tubes 73-21-10-000-002 Removal of the Hydromechanical Unit (HMU) 79-21-20-000-002 Removal of the Main Oil/Fuel Heat Exchanger 73-11-10-991-300 Fig. 401 73-11-10-991-301 Fig. 402 73-11-10-991-302 Fig. 403
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3. Job Set-up
__________
Subtask 73-11-10-941-056
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC
1(2). R
R Subtask 73-11-10-861-052
R B. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
R Subtask 73-11-10-865-056
R C. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 49VU FUEL/LP VALVE/MOT1/ENG2 2QG A09 R 49VU FUEL/LP VALVE/MOT1/ENG1 1QG A08
Subtask 73-11-10-010-061
R D. Open the fan cowl doors (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
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Subtask 73-11-10-010-062
R E. Get Access
(1) Place 2 appropriate containers one under the fuel pump and one under the Hydromechanical Unit (HMU).
(2) Remove the fuel filter (Ref. TASK 73-11-10-000-004) and inspect the fuel filter (Ref. TASK 73-11-10-210-003).
(3) Remove the HMU (Ref. TASK 73-21-10-000-002).
(4) Remove the servo-fuel heater (Ref. TASK 73-11-20-000-002).
(5) Remove the oil/fuel heat exchanger (Ref. TASK 79-21-20-000-002).
4. Procedure
_________ (Ref. Fig. 401/TASK 73-11-10-991-300, 402/TASK 73-11-10-991-301, 403/TASK 73-11-10-991-302) Subtask 73-11-10-020-056
A. Removal of the Fuel Pump and Filter Assembly
(1) Remove the clamp securing the aft sump oil supply tube from the Accessory Gearbox (AGB) to the fuel pump and remove the tube.
(2) Disconnect the fuel tube. CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS.
_______ ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
(a) Remove bolts (140), disconnect the fuel supply tube (20) from the fuel pump and retain the gasket (130).
(3) Disconnect the fuel filter differential pressure tubes (Ref. TASK 73-11-49-000-041).
(4) Remove the main oil fuel heat exchanger and the fuel pump pad drain tubes (Ref. TASK 71-73-49-000-049).
(5) Cut and remove lockwire and remove the Quick-Attach-Detach (QAD) bolt (150). Retain its retaining packing (160) and the ball seat washer (180). (Ref. Fig. 402/TASK 73-11-10-991-301)
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Fuel Pump and Filter Assembly
Figure 401/TASK 73-11-10-991-300
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R Engagement/Disengagement of the QAD Ring Figure 402/TASK 73-11-10-991-301
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R Fuel Pump and Filter Assembly Figure 403/TASK 73-11-10-991-302
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