Installation of the Fuel Crossfeed Valve

TASK 28-23-41-400-001-A
Installation of the Fuel Crossfeed Valve

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: 141
ZONE: 142
ZONE: 147
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	AR	PLUG - BLANKING
No specific	Torque wrench: range to between 16 and 12 m.N (141.59 and 106.19 lbf.in )
No specific	Torque wrench: range to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )
No specific	Torque wrench: range to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03JBA1)	Silicone base Grease-General Purpose - -
(Material No.06ABA1)	Polysulfide Sealant-Fuel Tank Brushable -

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
23	O-RING	AIPC 28-23-05-01-110
7	O-RINGS	AIPC 28-23-05-01-110
18	O-RING	AIPC 28-23-05-01-130
13	O-RING	AIPC 28-23-05-02-100
3	O-RING	AIPC 28-23-05-03-050
13	O-RING	AIPC 28-23-85-01-120
23	O-RING	AIPC 28-23-85-01-120
7	O-RINGS	AIPC 28-23-85-01-120
18	O-RING	AIPC 28-23-85-01-140
3	O-RING	AIPC 28-23-85-03-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-23-41-400-002-A	Installation of the Fuel Crossfeed Valve - Drive Assembly
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 28-25-00-650-001-A	Pressure Defuel
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
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
TASK 57-17-11-400-001-A	Installation of Access Cover 147AZ(148AZ)
TASK 57-17-11-400-001-B	Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door
Crossfeed Valve

3. Job Set-up
Subtask 28-23-41-860-050-B

A. Aircraft Maintenance Configuration

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) Make sure that the wing and center tanks (Ref. AMM TASK 28-25-00-650-001) are defueled.
(2) On the panel 40VU, make sure that:

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

(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position under the main door of the right main gear.
(4) Make sure that the main door of the right main gear (Ref. AMM TASK 32-12-00-010-001) is open.
(5) Make sure that the manhole cover 148AZ (Ref. AMM TASK 57-17-11-000-001) is removed.
(6) Make sure that the crossfeed valve actuator 5QE (Ref. AMM TASK 28-23-51-000-001) is removed.

4. Procedure
Subtask 28-23-41-530-051-A

A. Remove the PLUG - BLANKING from the pump (19), the pipes (6), (14), (21), (26) and (28) and the hole openings of the fuel tank.

Subtask 28-23-41-640-050-A

B. Preparation For Installation
(1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) on a new AIPC 28-23-05-03-050 O-RING (3) or AIPC 28-23-85-03-050 O-RING (3), AIPC 28-23-05-02-100 O-RING (13) or AIPC 28-23-85-01-120 O-RING (13), AIPC 28-23-05-01-130 O-RING (18) or AIPC 28-23-85-01-140 O-RING (18), AIPC 28-23-05-01-110 O-RINGS (7) or AIPC 28-23-85-01-120 O-RINGS (7) and the AIPC 28-23-05-01-110 O-RING (23) or AIPC 28-23-85-01-120 O-RING (23).
(2) Install the new O-rings (3), (7) and (13) on the crossfeed valve (11).
(3) Install the new O-ring (23) on the pipe (21).
(4) Apply Silicone base Grease-General Purpose - - (Material No.03JBA1) on the end of the shaft of the crossfeed valve (11).
(5) Apply Polysulfide Sealant-Fuel Tank Brushable - (Material No.06ABA1) on the head of the screws (1).

Subtask 28-23-41-420-050-A

C. Installation of the Fuel Crossfeed Valve (10QM)
(1) Install the crossfeed valve (11) on the rear spar (2):
(a) Make sure that the crossfeed valve (11) is in the closed position.
(2) Install the screws (1) on the rear spar (2).
(3) TORQUE the screws (1) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(4) Install the new O-ring (18) between the cross union (27) and the pump (19).
(5) Install the cross union (27) together with the pipes (6) and (26) on the pump (19).
(6) Connect the cross union (27) together with the pipes (6) and (26) to the crossfeed valve (11) and to the pipe (21).

NOTE: The play between the connections of the pipes (6), the pipe (26) and the cross union (27) will help you to connect the pipes (6) to the crossfeed valve (11) and (26) to the pipe (21).

(7) Tighten the nuts (8), (12) and (22) with your hand.
(8) Install the washers (17) and the screws (16) on the cross union (27).
(9) TORQUE the screws (16) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(10) Connect the pipe (28) to the cross union (27) with the nut (29).
(11) TORQUE the nut (29) to between 16 and 12 m.N (141.59 and 106.19 lbf.in )

.
(12) Install the bonding strap (24) with the bolt (25) and the nut (20).
(13) TORQUE the nut (20) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(14) Install the bonding straps (5) on the crossfeed valve (11) with the bolts (4), the washers (9) and the nuts (10).
(15) TORQUE the nuts (10) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )

.
(16) Do the electrical bonding check (Ref. AMM TASK 20-28-00-912-802).

Subtask 28-23-41-420-051-A

D. Install the Drive Assembly (Ref. AMM TASK 28-23-41-400-002).

Subtask 28-23-41-420-052-A

E. Install the Crossfeed Valve Actuator (5QE) (Ref. AMM TASK 28-23-51-400-001).

Subtask 28-23-41-710-050-A

F. Do a functional test of the crossfeed valve (Ref. AMM TASK 28-23-00-720-001).

Subtask 28-23-41-790-050-A

G. Do a Check for Leakage
(1) Make sure that there is no leakage at the crossfeed valve (11), the pump (19) and the connections between pipes (26) and (21).
(2) Remove the container CONTAINER 5 L (1.32 USGAL).

5. Close-up
Subtask 28-23-41-410-050-A

A. Close Access
(1) Make sure that there are no unwanted objects and materials, tools or other equipment in the wing and center tanks.
(2) Install the manhole cover 148AZ (Ref. AMM TASK 57-17-11-400-001).
(3) Close the main door of the right main gear (Ref. AMM TASK 32-12-00-410-001).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Remove the access platform(s).

Subtask 28-23-41-650-051-A

B. Refuel the wing and center tanks (Ref. AMM TASK 12-11-28-650-003).

[Rev.10 from 2021] 2026.04.02 06:17:33 UTC