Installation of the Fuel Drain Valve

TASK 28-25-44-400-001-A
Installation of the Fuel Drain Valve

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

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.

FIN: 31QM
FIN: 32QM

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	AR	SAFETY BARRIER(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540AB, 540BZ, 640AB, 640BZ
FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
540AB, 540BZ
FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
640AB, 640BZ

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
2	O-RING	AIPC 28-25-05-20-150
2	O-RING	AIPC 28-25-85-22-140
FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
2	O-RING	AIPC 28-25-05-30-025
2	O-RING	AIPC 28-25-85-22-140

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-25-00-650-001-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 28-25-00-869-001-A	Fuel Transfer
TASK 57-27-11-000-001-A	Removal of the Access Panel
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-12-000-002-A	Removal of the Rib 2 Access Panel 540AZ(640AZ) or 540BZ(640BZ)
Fuel Drain Valve 31QM(32QM)
FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
TASK 57-27-11-400-001-A	Installation of the Access Panel
TASK 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)

3. Job Set-up
Subtask 28-25-44-941-052-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) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 28-25-44-860-051-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001) .
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT) is below the applicable access panel 540AB (640AB).
(4) Make sure that the applicable access panel 540AB (640AB) is removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001).

(5) Make sure that the applicable spring-loaded cover 540BZ (640BZ) is held open by the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS).

Subtask 28-25-44-860-051-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the applicable fuel tank is defueled (Ref. AMM TASK 28-25-00-650-001).
(2) Make sure that the remaining fuel has been drained from the applicable fuel tank (Ref. AMM TASK 28-25-00-650-003).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT) is below the applicable access panel 540AB ( 640AB).
(4) Make sure that the applicable access panels 540AB ( 640AB) are removed (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(5) Make sure that the applicable RIB2 access panels 540BZ ( 640BZ) are removed (Ref. AMM TASK 57-27-12-000-002).

4. Procedure
Subtask 28-25-44-420-051-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Lubricate the new O-ring with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)

Lubricate the AIPC 28-25-05-20-150 O-RING (2)

(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)

Lubricate the AIPC 28-25-05-30-025 O-RING (2).

Subtask 28-25-44-420-051-B ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and the adjacent areas with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Lubricate the new O-ring with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)

Lubricate the AIPC 28-25-05-20-150 O-RING (2) or AIPC 28-25-85-22-140 O-RING (2)

(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)

Lubricate the AIPC 28-25-05-30-025 O-RING (2) or AIPC 28-25-85-22-140 O-RING (2).

Subtask 28-25-44-420-050-A

B. Installation of the Fuel Drain Valve
(1) Remove the blanking plugs and install the O-ring (2) on the fuel drain valve (1).
(2) Install the fuel drain valve (1).

5. Close-up
Subtask 28-25-44-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the area is clean and clear of all tools and miscellaneous items of equipment.
(2) Remove the HOOK-COVER (RIB2-SURGE DOORS) and close the applicable rear spring-loaded cover in Rib 2:
(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
close 540BZ
(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
close 640BZ.
(3) Install the applicable access panel (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-001):
(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
install 540AB
(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
install 640AB.

Subtask 28-25-44-410-052-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable RIB2 access panels:
(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
Install 540BZ (Ref. AMM TASK 57-27-12-400-002)
(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
Install 640BZ (Ref. AMM TASK 57-27-12-400-002).
(3) Install the applicable access panels (Ref. AMM TASK 28-10-00-910-002):
(a) FOR [31QM] (VALVE-FUEL DRAIN, L WING TK)
Install 540AB (Ref. AMM TASK 57-27-11-400-001)
(b) FOR [32QM] (VALVE-FUEL DRAIN, R WING TK)
Install 640AB (Ref. AMM TASK 57-27-11-400-001).

Subtask 28-25-44-650-051-A

B. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001) or (Ref. AMM TASK 28-25-00-869-001).

Subtask 28-25-44-942-050-A

C. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(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 06:17:40 UTC