Removal of the LP Fuel Valve

TASK 28-24-41-000-001-A
Removal of the LP Fuel 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.

FIN: 12QM
FIN: 13QM

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 4M (13 FT)-ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	1	CONTAINER 10 L(2 1/2 USGAL)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-24-51-000-001-A	Removal of the LP Fuel Valve Actuator
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 57-41-37-000-003-A	Removal of the Access Panel
LP Fuel Valve 12QM (13QM)

3. Job Set-up
Subtask 28-24-41-941-054-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) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-24-41-861-050-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 28-24-41-650-052-A

C. Fuel Configuration
(1) Make sure that there is not more than approximately 3500 kg (7716.1770 lb) of fuel in the applicable tank. If necessary, move the fuel to the opposite tank (Ref. AMM TASK 28-25-00-869-001) or defuel (Ref. AMM TASK 28-25-00-650-001).

Subtask 28-24-41-010-052-A

D. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the applicable access panel 522AT(622AT).
(2) Remove the access panel 522AT(622AT) (Ref. AMM TASK 57-41-37-000-003).

Subtask 28-24-41-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	FUEL/L WING TK/PUMP2 SPLY	7QA	N26
121VU	FUEL/L WING TK/PUMP1 SPLY	1QA	N23
121VU	FUEL/R WING TK/PUMP2 SPLY	8QA	Q26
121VU	FUEL/R WING TK/PUMP1 SPLY	2QA	Q23
FOR FIN: 12QM (VALVELP FUEL, ENG 1)
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25
FOR FIN: 13QM (VALVELP FUEL, ENG 2)
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
** ON A/C NOT FOR ALL
121VU	FUEL/CTR TK/PUMP2 SPLY	30QA	P26
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
** ON A/C ALL
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26

Subtask 28-24-41-210-054-A

F. General Check
(1) On the fuel control panel, 40VU:

make sure that the ON and OPEN legends on the crossfeed valve pushbutton switch are off.

Subtask 28-24-41-862-050-A

G. De-energize the Electrical Circuits
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

4. Procedure
Subtask 28-24-41-020-052-B

A. Removal of the LP Fuel Valve 12QM(13QM)
(1) Remove LP fuel-valve actuator 9QG(10QG) (Ref. AMM TASK 28-24-51-000-001).
(2) Put a CONTAINER 10 L(2 1/2 USGAL) below the LP fuel valve (18).
(3) Loosen and remove the nut (12).
(4) Remove the bolt (15) and disconnect the end of the bonding strips (14) and (13).

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(5) Cut and discard the lockwire from the nuts (19) and (2).
(6) Hold the connector (3) and release the nut (19) from the connector.
(7) Slowly move the pipe assembly (1) away from the LP fuel valve (18) until fuel leakage occurs.
(8) Soak the fuel fully from the pipe with a Textile-Lint free Cotton - (Material No.14SBA1) .
(9) When all the fuel is removed, pull the pipe (1) as far as possible, away from the LP fuel valve (18).
(10) Remove and discard the O-rings (20) and (21).
(11) Put the CAP - BLANKING on the the pipe (1).
(12) Loosen and remove the bolts (5).
(13) Loosen and remove the bolt (17) and the washer (16).
(14) Remove the LP fuel valve (18) and discard the O-ring (7).
(15) Make sure that you soak the fuel fully from the LP fuel valve with a Textile-Lint free Cotton - (Material No.14SBA1) .
(16) Put the cap blanking on the mounting plate (8).
(17) Remove the wet cloth and put them into an approved container.
(18) If you replace the LP fuel valve, remove the circlip (4) and the nut (19).

[Rev.10 from 2021] 2026.04.02 07:03:01 UTC