To Remove Collected Fuel from the Center Tank

TASK 28-25-00-650-004-A
To Remove Collected Fuel from the Center Tank

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: DO NOT SPILL FUEL ON THE ENGINES OR THE BRAKES. IF YOU SPILL FUEL ON ENGINES OR BRAKES THAT ARE HOT, IT CAN CAUSE FIRES.

1. Reason for the Job
To remove collected fuel from a center tank that is not in use.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)

B. 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 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer

3. Job Set-up
Subtask 28-25-00-941-081-A

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) Put the SAFETY BARRIER(S) in position.

Subtask 28-25-00-861-056-A

B. Energize the Electrical Circuits
(1) Energize the aircraft electrical network (Ref. AMM TASK 24-41-00-861-002).

Subtask 28-25-00-010-079-A

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the center tank water drain valves 94QM and 95QM.

4. Procedure
Subtask 28-25-00-650-068-A

A. Remove Collected Fuel from the Center Tank
(1) Operate the water drain valves 94QM and 95QM to drain collected water from the center tank.
(2) Examine the water drain valves 94QM and 95QM for leakage. Leaks are not permitted.

NOTE: This step is very important at the center tank water drain valves 94QM and 95QM, where access is not easy.

(3) Do a FQI check to make sure the center tank contains a minimum fuel quantity of 1000 kg (2205 lb).

NOTE: This is to make sure that the center tank fuel pumps are full of fuel.

(4) If necessary, refuel/transfer fuel into the center tank to give a minimum indicated fuel quantity of 1000 kg (2205 lb) (Ref. AMM TASK 28-25-00-869-001).
(5) Defuel the center tank (Ref. AMM TASK 28-25-00-650-001).

5. Close-up
Subtask 28-25-00-410-071-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 28-25-00-862-056-A

B. De-energize the Electrical Circuits
(1) De-energize the aircraft electrical network (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-25-00-942-078-A

C. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:36 UTC