Installation of the Refuel Valve Canister

TASK 28-25-52-400-002-A
Installation of the Refuel Valve Canister

WARNING: THIS PROCEDURE USES A FUEL SYSTEM ITEM THAT IS IN A CATEGORY KNOWN AS A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL). CDCCL IDENTIFIES AN ITEM THAT CAN BE THE SOURCE OF A POSSIBLE FUEL TANK IGNITION. YOU MUST KEEP ALL CDCCL ITEMS IN THE APPROVED CONFIGURATION. DAMAGE, WEAR OR CHANGES TO A CDCCL ITEM CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.

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: 88QM

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	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(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
148AZ

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
13	O-RING	AIPC 28-25-05-02-230
4	O-RING	AIPC 28-25-05-02-230
15	O-RING	AIPC 28-25-05-04-050
15	O-RING	AIPC 28-25-85-04-050

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 28-10-00-910-001-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 28-25-51-000-002-A	Removal of the Refuel Valve
TASK 28-25-51-400-002-A	Installation of the Refuel Valve
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
Refuel Valve Canister 88QM

3. Job Set-up
Subtask 28-25-52-941-054-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) Make sure that the SAFETY BARRIER(S)S are in position.
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the main gear doors.

Subtask 28-25-52-860-053-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 main landing gear doors are open (Ref. AMM TASK 32-12-00-010-001) .
(4) Make sure that the 460005835 SLEEVE - GROUND LOCK is on the applicable main gear door actuator.
(5) Make sure that the center tank access panel 148AZ is removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-17-11-000-001).
(6) Make sure that the refuel valve has been removed (Ref. AMM TASK 28-25-51-000-002).

Subtask 28-25-52-860-053-C ** ON A/C NOT FOR ALL

Subtask 28-25-52-865-052-A

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L24
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L23
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22

4. Procedure
Subtask 28-25-52-420-055-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) Lubricate the new O-ring (15) and the new O-ring (4) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .
(3) Lubricate the new O-ring (13) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .
(4) Install the AIPC 28-25-05-04-050 O-RING (15) or AIPC 28-25-85-04-050 O-RING (15) in the groove on the face of the refuel valve canister (14).

Subtask 28-25-52-420-052-A

B. Installation of the Refuel Valve Canister 88QM

NOTE: You must bond one of the screws (16) (Ref. AMM TASK 20-28-00-912-802).

(1) Install the refuel valve canister (14) in position.
(2) Install with the screws (16).

WARNING: THIS INSTRUCTION IS APPLICABLE TO A CRITICAL DESIGN CONFIGURATION CONTROL LIMITATION (CDCCL) ITEM. CAREFULLY OBEY ALL GIVEN INSTRUCTIONS WHEN YOU DO THIS STEP. IF YOU DO NOT OBEY THESE INSTRUCTIONS, A DANGEROUS CONDITION CAN OCCUR THAT CAN CAUSE A POSSIBLE FUEL TANK EXPLOSION.

(a) Do a bonding check of one of the screws (16) (Ref. AMM TASK 20-28-00-912-802). The bonding resistance must be less than 10 miliohms.
(3) Remove the blanking plugs from the disconnected line ends.
(4) Install the AIPC 28-25-05-02-230 O-RING (4) in the groove in the adapter (3). Connect the elbow (3) to the refuel valve canister (14) with the bolts (1) and washers (2).
(5) Install the AIPC 28-25-05-02-230 O-RING (13) in the groove in the elbow (12). Connect the elbow (12) to the refuel valve canister (14) with the bolts (11) and washers (10).
(6) Attach the bonding straps (6) and (8) to the refuel valve canister (14) (Ref. AMM TASK 20-28-00-912-802) with the screw (9), the washer (7) and the nut (5).
(7) Make sure that the bonding straps (6) and (8) are correctly bonded:
(a) Do a bonding check between the bonding straps (6) and (8) and the refuel valve canister (14) (Ref. AMM TASK 20-28-00-912-802). The bonding resistance must be less than 10 milliohms.

Subtask 28-25-52-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the center tank access panel 148AZ (Ref. AMM TASK 57-17-11-400-001).
(3) Install the refuel valve (Ref. AMM TASK 28-25-51-400-002).

Subtask 28-25-52-410-051-C ** ON A/C NOT FOR ALL

Subtask 28-25-52-650-053-A

D. 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 28-25-52-790-051-A

E. Test
(1) Make sure there are no leaks at the interface of the refuel valve canister (14) with the structure.

5. Close-up
Subtask 28-25-52-410-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the main landing gear doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 28-25-52-942-053-A

B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:43 UTC