Removal of the Defuel/Transfer Valve - Drive Assembly

TASK 28-25-43-000-002-A
Removal of the Defuel/Transfer Valve - Drive Assembly

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: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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	AR	PLUG - BLANKING

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 28-25-53-000-001-A	Removal of the Center-Tank Defuel/Transfer Valve-Actuator
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
Defuel/Transfer Valve Drive Assembly

3. Job Set-up
Subtask 28-25-43-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) Put the safety barriers in position.

Subtask 28-25-43-860-051-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(1) On the refuel/defuel control panel 800VU, make sure that:

the MODE SELECT switch is set to OFF
the OPEN warning light is off.

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

Subtask 28-25-43-010-052-A ** ON A/C NOT FOR ALL

C. Removal for Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the main door of the right main gear.
(2) Open the main door of the right main gear (Ref. AMM TASK 32-12-00-010-001).

4. Procedure
Subtask 28-25-43-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Defuel/Transfer Valve (11QM) - Drive Assembly
(1) Remove the valve actuator 11QU (Ref. AMM TASK 28-25-53-000-001).
(2) Hold the drive assembly (3) and remove the nuts (1) and the bonding lead (2).
(3) Disengage and remove the drive assembly (3) from its position.
(4) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 07:03:17 UTC