Removal of the APU Fuel-Pump Canister

TASK 28-22-52-000-001-A
Removal of the APU Fuel-Pump Canister

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

ZONE: 141
FIN: 9QM

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
141	WING CENTER BOX
147AZ

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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-22-51-000-001-A	Removal of the APU Fuel Pump
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 57-17-11-000-001-A	Removal of Access Cover 147AZ(148AZ)
TASK 57-17-11-000-001-B	Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
APU Fuel Pump Canister ** ON A/C NOT FOR ALL
APU Fuel Pump Canister ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-22-52-861-050-A

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

Subtask 28-22-52-869-050-A

B. On the overhead control and indicating panel 25VU, make sure that the APU/MASTER SW pushbutton switch is released (out). (On this pushbutton switch, the ON legend is off).

Subtask 28-22-52-650-050-A

C. Fuel Configuration
(1) Make sure that the crossfeed valve is in the closed position.
(2) Defuel the center tank and the left wing tank (Ref. AMM TASK 28-25-00-650-001).
(3) Drain the remaining fuel from the center tank and the left wing tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 28-22-52-862-050-A

D. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-22-52-010-050-A

E. Removal for Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position under the main door of the left main gear.
(2) Open the main door of the left main gear (Ref. AMM TASK 32-12-00-010-001).
(3) Remove the manhole cover 147AZ (Ref. AMM TASK 57-17-11-000-001).
(4) Remove the APU fuel pump 4QC (Ref. AMM TASK 28-22-51-000-001).

Subtask 28-22-52-910-050-A

F. You must obey the special fuel safety procedures when you work in the fuel tank (Ref. AMM TASK 28-10-00-910-001) (Ref. AMM TASK 28-10-00-910-002).

4. Procedure
Subtask 28-22-52-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the APU Fuel Pump Canister
(1) Put a CONTAINER 5 L (1.32 USGAL) below the pump canister (22).
(2) Remove the nut (16), the bolt (13), the washer (14) and disconnect the bonding strip (15).
(3) Loosen the nuts (8) and remove the line (17).
(4) Remove the screws (11) and the washers (10).
(5) Remove the screws (18) and the washers (19).
(6) Remove the nut (2), the bolt (4) and disconnect the bonding strip (3).
(7) Cut and remove the lockwire from the screws (5).
(8) Hold the pump canister (22) and remove the five screws (5), the washers (6) and the gutter (7).
(9) Remove the pump canister (22), and remove and discard the O-rings (9), (21) and (23).
(10) Put the PLUG-BLANKING in each disconnected line end.

Subtask 28-22-52-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the APU Fuel Pump Canister
(1) Put a CONTAINER 5 L (1.32 USGAL) below the pump canister (22).
(2) Remove the nut (16), the bolt (13), the washer (14) and disconnect the bonding strip (15).
(3) Loosen the nuts (8) and remove the line (17).
(4) Remove the screws (11) and the washers (10).
(5) Remove the screws (18) and the washers (19).
(6) Remove the nut (2), the bolt (4) and disconnect the bonding strip (3).
(7) Cut and remove the lockwire from the screws (5).
(8) Hold the pump canister (22) and remove the five screws (5), the washers (6) and the bonding lug (7).
(9) Remove the pump canister (22), and remove and discard the O-rings (9), (21) and (23).
(10) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 06:17:32 UTC