Removal of the Transfer Valve Drive

TASK 28-15-42-000-002-A
Removal of the Transfer Valve Drive

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.

FIN: 71QM ** ON A/C NOT FOR ALL
FIN: 73QM ** 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	ACCESS PLATFORM 3M (10 FT)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [71QM] (DRIVE SHAFT-TRANSFER VALVE, L REAR SPAR)
540JB, 540KB
FOR [73QM] (DRIVE SHAFT-TRANSFER VALVE, R REAR SPAR)
640JB, 640KB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
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 28-15-41-000-001-A	Removal of the Transfer Valve
TASK 28-15-51-000-002-A	Removal of the Actuator
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 57-27-11-000-002-A	Removal of the Access Panel
Transfer Valve Drive

3. Job Set-up
Subtask 28-15-42-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) You must obey the fuel safety procedures (Ref. AMM TASK 28-10-00-910-001) when you do work in a fuel tank.
(2) Put the SAFETY BARRIER(S) in position.
(3) Put a WARNING NOTICE(S) in position to tell persons not to operate the flight controls.

Subtask 28-15-42-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/XFR VALVE1/WING/R	2QP	A11
49VU	FUEL/XFR VALVE1/WING/L	1QP	A10
121VU	FUEL/XFR VALVE2/WING/R	4QP	M23
121VU	FUEL/XFR VALVE2/WING/L	3QP	M22

Subtask 28-15-42-860-052-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Extend the flaps fully (Ref. AMM TASK 27-50-00-866-008).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is on the slat/flap control lever.
(3) Extend the No. 3 spoiler (Ref. AMM TASK 27-60-00-866-002).
(4) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER is on the applicable spoiler servo-control.

Subtask 28-15-42-650-052-A ** ON A/C NOT FOR ALL

D. Fuel Configuration
(1) Defuel the applicable fuel tank (Ref. AMM TASK 28-25-00-650-001).
(2) Drain the remaining fuel from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 28-15-42-010-051-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below the applicable zone 540(640).
(2) Remove the applicable wing access panels (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-002):

(a) FOR [71QM] (DRIVE SHAFT-TRANSFER VALVE, L REAR SPAR)
remove 540JB 540KB
(b) FOR [73QM] (DRIVE SHAFT-TRANSFER VALVE, R REAR SPAR)
remove 640JB 640KB.

4. Procedure
Subtask 28-15-42-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Transfer Valve Drive 71QM(73QM)
(1) Remove the applicable transfer valve actuator (8) (Ref. AMM TASK 28-15-51-000-002).
(2) Hold the transfer valve drive (12) and remove the applicable transfer valve (1) (Ref. AMM TASK 28-15-41-000-001).
(3) Remove the nuts (5) and pull away the actuator mounting (3) to remove the bonding strap (6). Remove and discard the O-ring seals (2).
(4) Remove the nut (4) and the screw (7), and disconnect the bonding strap (6). Remove the actuator mounting (3).
(5) Remove the bolts (11) and the transfer valve drive (12).
(6) Remove and discard the O-ring seals (9) and (10).

[Rev.10 from 2021] 2026.04.02 06:17:15 UTC