Removal of the Fuel Pump and Filter Assembly [CFMB]

TASK 73-11-10-000-003-A
Removal of the Fuel Pump and Filter Assembly

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CONTAINER - CLEAN, APPLICABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 315 and 285 lbf.in (3.56 and 3.22 m.daN )
856A2609	1	BLOCK,JACKING-FUEL PUMP

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-73-49-000-049-B	Removal of the Reservoir to Manifold Hydraulic Oil Drain Tube
TASK 73-11-10-000-004-A	Removal of the Fuel Filter Element
TASK 73-11-10-210-003-A	Visual Inspection of the Fuel Filter Cartridge
TASK 73-11-10-620-002-A	Preservation of the Fuel Pump and Filter Assembly
TASK 73-11-20-000-002-A	Removal of the Servo Fuel Heater
TASK 73-11-49-000-041-A	Removal of the Fuel Tubes
TASK 73-21-10-000-002-A	Removal of the Hydromechanical Unit (HMU)
TASK 79-21-20-000-002-A	Removal of the Main Oil/Fuel Heat Exchanger
Fuel Pump and Filter Assembly
Engagement/Disengagement of the QAD Ring
Fuel Pump and Filter Assembly

3. Job Set-up
Subtask 73-11-10-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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(S) to tell persons not to energize the FADEC 1(2).

Subtask 73-11-10-861-052-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 73-11-10-865-056-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 1000EM2 (ENGINE2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 73-11-10-010-061-A ** ON A/C NOT FOR ALL

D. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 73-11-10-010-062-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Place 2 appropriate CONTAINER - CLEAN, APPLICABLE one under the fuel pump and one under the Hydromechanical Unit (HMU).
(2) Remove the fuel filter (Ref. AMM TASK 73-11-10-000-004) and inspect the fuel filter (Ref. AMM TASK 73-11-10-210-003).
(3) Remove the HMU (Ref. AMM TASK 73-21-10-000-002).
(4) Remove the servo-fuel heater (Ref. AMM TASK 73-11-20-000-002).
(5) Remove the oil/fuel heat exchanger (Ref. AMM TASK 79-21-20-000-002).

4. Procedure
Subtask 73-11-10-020-056-A ** ON A/C NOT FOR ALL

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 TWO 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 PREVENTS DAMAGE TO THE PARTS.

(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. AMM TASK 73-11-49-000-041).
(4) Remove the main oil fuel heat exchanger and the fuel pump pad drain tubes (Ref. AMM 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).

Engagement/Disengagement of the QAD Ring ** ON A/C NOT FOR ALL

(6) Install the bolt (150) in reverse position.
(7) Install the 856A2609 BLOCK,JACKING-FUEL PUMP (856A2609G01).
(8) TORQUE the QAD bolt:

CAUTION: OBEY THE TORQUE VALUES SPECIFIED BELOW.

CAUTION: DURING REMOVAL, KEEP DRIVE SHAFT PERPENDICULAR TO AGB MOUNTING FLANGE. NEVER ALLOW WEIGHT TO BE TAKEN BY DRIVE SHAFT.

(a) TORQUE the bolt to between 315 and 285 lbf.in (3.56 and 3.22 m.daN )

and hit the QAD ring (170) until it moves sufficiently to disengage the fuel pump.
(9) Carefully pull the fuel pump rearward to disengage the pump drive shaft from the AGB drive pad.
(10) Remove the 856A2609 BLOCK,JACKING-FUEL PUMP.

PRE SB CFM56-5 72-094
(11) Remove the seal ring assembly (70) from QAD ring and keep it if not damaged.

POST SB CFM56-5 72-094
(12) Remove the seal ring assembly (70) from QAD ring.

NOTE: The seal ring assembly (70) is made of a support (metal ring) (190) and a preformed packing (200).

(13) If the preformed packing (200) is damaged, do as follows:
(a) Remove the preformed packing (200) from the support (190).
(b) Discard the preformed packing (200).
END OF SB CFM56-5 72-094
(14) Remove and discard the O-ring (80) from the fuel pump drive shaft.
(15) Remove the seal ring assembly from the AGB housing.
(16) Remove the nipples (60), (100) and (110).
(17) Remove and discard the O-rings (50), (90) and (120).
(18) Plug and cap all open parts and orifices.
(19) Preserve the fuel pump (Ref. AMM TASK 73-11-10-620-002).

[Rev.10 from 2021] 2026.04.01 07:30:45 UTC