Installation of the Outer Valve

TASK 28-11-41-400-005-A
Installation of the Outer 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.

FIN: 21QM
FIN: 22QM
FIN: 23QM ** ON A/C NOT FOR ALL
FIN: 24QM ** ON A/C NOT FOR ALL
FIN: 25QM
FIN: 26QM

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)
No specific	AR	CONTAINER 1 L (1/4 USGAL)
No specific	AR	SAFETY BARRIER(S)
No specific	Torque wrench: range to between 0.825 and 0.675 m.daN (73.01 and 59.73 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	O-RING	AIPC 28-11-41-01-020
3	O-RING	AIPC 28-11-41-02-020
3	O-RING	AIPC 28-11-41-03-020

D. Referenced Information

REFERENCE	DESIGNATION
TASK 28-00-00-910-001-A	Fuel Safety Procedures
Outer Valve - Wing Tank ** ON A/C NOT FOR ALL
Outer Valve - Wing Tank ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-11-41-941-075-A

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 28-11-41-860-060-A

B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 4M (13 FT) is in position below the applicable water drain valve.
(2) Make sure that the CONTAINER 1 L (1/4 USGAL) is in position below the applicable water drain valve.

4. Procedure
Subtask 28-11-41-420-055-A

A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(a) If the component(s) of the outer valve (4) is (are) unserviceable, replace the component(s).
(4) Make sure that the threads of the outer valve (4) and of the water drain valve (2) are clean and serviceable.
(5) Push in, then quickly release the inner valve (1) to let the fuel flush the water drain valve (2). Collect the fuel in the container.

Subtask 28-11-41-420-061-A ** ON A/C NOT FOR ALL

B. Installation of the Outer Valve
(1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) :

to the new AIPC 28-11-41-01-020 O-RING (3) for the outer valve (4) 21QM (22QM)
to the new AIPC 28-11-41-02-020 O-RING (3) for the outer valve (4) 23QM (24QM)
to the new AIPC 28-11-41-03-020 O-RING (3) for the outer valve (4) 25QM (26QM).

(2) Install the O-ring (3) on the outer valve (4).
(3) Install the outer valve (4) in the water drain valve (2).
(4) TORQUE the outer valve (4) to between 0.825 and 0.675 m.daN (73.01 and 59.73 lbf.in )

Subtask 28-11-41-420-061-B ** ON A/C NOT FOR ALL

B. Installation of the Outer Valve
(1) Apply Turbine Fuel-- Kerosene - (Material No.01ABA1) :

to the new AIPC 28-11-41-01-020 O-RING (3) for the outer valve (4) 21QM (22QM)
to the new AIPC 28-11-41-03-020 O-RING (3) for the outer valve (4) 25QM (26QM).

Subtask 28-11-41-790-054-A

C. Leak Test
(1) Examine the outer valve (4) and the water drain valve (2) for leaks.

5. Close-up
Subtask 28-11-41-942-054-A

A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the access platform(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 06:17:05 UTC