Removal of the Fuel-Pump Suction Valve

TASK 28-21-42-000-001-A
Removal of the Fuel-Pump Suction Valve

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.

ZONE: 540
ZONE: 640

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	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
98D57004014000	1	HOOK-COVER (RIB2-SURGE DOORS)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540	FUEL TANK
640	FUEL TANK
540AB, 540BZ, 640AB, 640BZ

C. Referenced Information

REFERENCE	DESIGNATION
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 28-21-54-000-002-A	Removal of the Fuel Pump Strainers
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 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-12-000-002-A	Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
Fuel-Pump Suction Valve ** ON A/C NOT FOR ALL
Fuel-Pump Suction Valve ** ON A/C NOT FOR ALL
Fuel-Pump Suction Valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-21-42-941-053-A

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(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.

Subtask 28-21-42-650-050-A

B. 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 28-21-42-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below zone 540(640).
(2) Remove the applicable wing access panel 540AB(640AB) (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001).
(3) Open the surge door 540BZ(640BZ) to get access to the fuel-pump suction valve.
(4) Install the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) to hold the applicable surge door open.

Subtask 28-21-42-010-050-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the applicable zone 540 (640).
(2) Remove the applicable wing access panel 540AB ( 640AB) (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(3) Remove the applicable RIB2 access panel 540BZ ( 640BZ) to get access to the fuel pump suction valve (Ref. AMM TASK 57-27-12-000-002).

4. Procedure
Subtask 28-21-42-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Fuel-Pump Suction Valve
(1) Disconnect the fuel-pipe connector nut (5) and pull it away from the fuel-pump suction valve (3).
(2) Remove the nuts (8), the bolts (1) and the bolts (2). Remove the bonding strap tag (9), attached to the bonding strap (7), from the bolt (1).
(3) Remove the fuel-pump suction valve (3) from its installed position.
(4) Remove and discard the O-ring (4) from the fuel pipe (6).
(5) Seal the open end of the fuel pipe (6) with a CAP - BLANKING.

Subtask 28-21-42-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Fuel-Pump Suction Valve
(1) Disconnect the fuel-pipe connector nut (5) and pull it away from the fuel-pump suction valve (10).
(2) Remove the suction valve strainer assembly (Ref. AMM TASK 28-21-54-000-002).
(3) Remove the bolt (1). Let the tag (12) and the bonding strap (7) stay attached to the fuel pipe (6) .
(4) Remove the two bolts (3).
(5) Remove the baffle (13).
(6) Remove the bolt (2) and the link plate (9).
(7) Remove the bolt (11) and the nut (8).
(8) Remove the fuel-pump suction valve (10) from its installed position.
(9) Remove and discard the O-ring (4) from the fuel pipe (6).
(10) Seal the open end of the fuel pipe (6) with a CAP - BLANKING.

[Rev.10 from 2021] 2026.04.02 06:17:24 UTC