Installation of the Fuel Return Pump [PW11]

TASK 73-13-02-400-801-A
Installation of the Fuel Return Pump

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400
FIN: 4052EM ** 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	Torque wrench: range to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )
No specific	Torque wrench: range to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )
No specific	Torque wrench: range to between 275 and 250 lbf.in (3.11 and 2.83 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.P03-001)	lubricant, aircraft turbine engine
(Material No.P06-054)	Antigalling Compound
(Material No.P18-023)	primer, zinc molybdate

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	PACKING	EIPC 73-13-02-01-080
4	PACKING	EIPC 73-13-02-01-090

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Fuel Return Pump

3. Job Set-up
Subtask 73-13-02-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833)

Subtask 73-13-02-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 73-13-02-040-051-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 73-13-02-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the right thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure
Subtask 73-13-02-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Return Pump

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the fuel return pump (1) on the fuel manifold as follows:

Fuel Return Pump ** ON A/C NOT FOR ALL

(a) Apply the P03-001lubricant, aircraft turbine engine to the threads of the fuel return pump (1).
(b) Apply the P18-023primer, zinc molybdate to the mating faces of the fuel manifold and fuel return pump (1).
(c) Apply the P03-001lubricant, aircraft turbine engine to the new EIPC 73-13-02-01-090 PACKING (4) and new EIPC 73-13-02-01-080 PACKING (5).
(d) Install the packings (4) and (5) on the fuel return pump (1).
(e) Install the fuel return pump (1) on the fuel manifold.
(f) TORQUE the fuel return pump (1) to between 275 and 250 lbf.in (3.11 and 2.83 m.daN )

.
(3) Connection of the tube

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.

(a) Connect the tube (FD04) to the pump (1).
(4) TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(5) TORQUE the B-nut again to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

NOTE: Do not loosen the B-nut.

(6) Apply the Antigalling Compound (Material No.P06-054) to the threads of bolt (3).

NOTE: For new or refurbished bolts or nuts with baked-on lubricant, do not do the wet application.

(7) Attach the tube (FD04) with the clamp (2) and bolt (3) to the bracket.
(8) TORQUE the bolt (3) to between 44 and 38 lbf.in (0.50 and 0.43 m.daN )

.
(9) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-13-02-860-050-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

Subtask 73-13-02-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 73-13-02-410-050-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

Subtask 73-13-02-720-050-A ** ON A/C NOT FOR ALL

D. Test
(1) Test No. 3: Idle Power Test (Ref. AMM TASK 71-00-00-720-811).

[Rev.10 from 2021] 2026.04.01 03:02:22 UTC