Installation of the Fuel Crossfeed Valve - Drive Assembly

TASK 28-23-41-400-002-A
Installation of the Fuel Crossfeed Valve - Drive Assembly

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

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.

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

ZONE: 142
ZONE: 148
FIN: 10QM

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	Torque wrench: range to between 0.13 and 0.11 m.daN (11.50 and 9.73 lbf.in )
No specific	Torque wrench: range to between 3.22 and 2.69 m.daN (23.75 and 19.84 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
142	WING CENTER BOX
148	MAIN GEAR WELL AND HYDRAULIC COMPARTMENT

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 28-23-00-720-001-A	Operational Check of Crossfeed Valve Using Individual Motors and Check Fuel Flow in "Open" and Fuel Shut Off in "Closed" Positions
TASK 28-23-51-000-001-A	Removal of the Crossfeed Valve Actuator
TASK 28-23-51-400-001-A	Installation of the Crossfeed Valve Actuator
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Crossfeed Valve Drive Assembly ** ON A/C NOT FOR ALL
Component location
Crossfeed Valve Drive Assembly ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-23-41-941-053-A

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) Make sure that the safety barriers are in position.

Subtask 28-23-41-860-052-B

B. Aircraft Maintenance Configuration
(1) On the panel 40VU, make sure that:

the FUEL/X FEED P/BSW 4QE is not pushed in (the ON and OPEN legends of the P/BSW are off).

(2) Make sure that the crossfeed valve actuator 5QE (Ref. AMM TASK 28-23-51-000-001) is removed.

Subtask 28-23-41-010-053-A

C. Get access to the avionics compartment.
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the main door of the right main gear.
(2) Make sure that the main door of the right main gear (Ref. AMM TASK 32-12-00-010-001) is open.

4. Procedure
Subtask 28-23-41-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Crossfeed Valve (10QM) - Drive Assembly
(1) Apply Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) to the gasket (8).
(2) Install the gasket (8) on the drive assembly (7).
(3) Put the drive assembly (7) in position and install the nuts (1).
(4) TORQUE the nuts (1) to between 0.13 and 0.11 m.daN (11.50 and 9.73 lbf.in )

.
(5) Install the bonding lead (2), washer (3), bolt (4), washer (5) and nut (6).
(6) TORQUE the nut (6) to between 3.22 and 2.69 m.daN (23.75 and 19.84 lbf.ft )

.
(7) Do an electrical bonding of the bonding lead (2) (Ref. AMM TASK 20-28-00-912-802).
(8) Install the crossfeed valve actuator (5QE) (Ref. AMM TASK 28-23-51-400-001).

Subtask 28-23-41-420-053-B ** ON A/C NOT FOR ALL

A. Installation of the Fuel Crossfeed Valve (10QM) - Drive Assembly
(1) Install the drive assembly (3), the bonding lead (2) and the nuts (1).
(2) TORQUE the nuts (1) to between 0.13 and 0.11 m.daN (11.50 and 9.73 lbf.in )

.
(3) Do an electrical bonding of the bonding lead (2) (Ref. AMM TASK 20-28-00-912-802).
(4) Install the crossfeed valve actuator (5QE) (Ref. AMM TASK 28-23-51-400-001).

Subtask 28-23-41-710-051-A

B. Do the operational test of the crossfeed valve (Ref. AMM TASK 28-23-00-720-001).

5. Close-up
Subtask 28-23-41-410-052-A

A. Close Access
(1) Close the main door of the right main gear (Ref. AMM TASK 32-12-00-410-001).
(2) Make sure that the work area is clean and clear of tools and other items.

Subtask 28-23-41-942-052-A

B. Removal of Equipment
(1) Remove the access platform(s).
(2) Remove the warning notice(s).
(3) Remove the safety barriers(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 07:02:56 UTC