Installation of the Fuel Recirculation Check-valve

TASK 28-16-42-400-001-A
Installation of the Fuel Recirculation Check-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: 122QM
FIN: 123QM

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	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.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
471BL
471CL
FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
482BR
481CR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	TAB WASHERS	AIPC 28-16-05-07-020
7	TAB WASHERS	AIPC 28-16-05-07-020
1	O-RING	AIPC 28-16-05-07-040
8	SEAL	AIPC 28-16-06-01-120
9	SEAL	AIPC 28-16-06-01-120
7	TAB WASHERS	AIPC 28-16-85-01-020
9	SEAL	AIPC 28-16-86-01-070

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 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-16-00-710-002-A	Operational Check of Pylon Check Valve to Ensure Valve not Failed Open
TASK 28-16-00-790-001-A	Leak Test of the Fuel Recirculation Cooling-System
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 54-53-11-000-002-A	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-002-A	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 73-11-50-360-002-A	Leak Check and Functional Test of the Fuel Return Valve
Check-valve ** ON A/C NOT FOR ALL
Check-valve ** ON A/C NOT FOR ALL
Check-valve ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-16-42-941-056-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 28-16-42-860-053-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 ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is below the applicable zone 470(480).
(4) Make sure that the applicable access panel is removed (Ref. AMM TASK 54-53-11-000-002):
(a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
471BL.
(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
482BR.

Subtask 28-16-42-860-053-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 4M (13 FT)-ADJUSTABLE is below the applicable zone 470(480).
(4) Make sure that the applicable access panel is removed (Ref. AMM TASK 54-53-11-000-002):
(a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
471CL.
(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
481CR.

Subtask 28-16-42-860-053-C ** 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 4M (13 FT)-ADJUSTABLE is below the applicable zone 470(480).
(4) Make sure that the applicable access panel is removed (Ref. AMM TASK 54-53-11-000-804):
(a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)
471BL.
(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)
482BR.

4. Procedure
Subtask 28-16-42-420-052-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the component interfaces and 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.
(4) Lubricate the new AIPC 28-16-05-07-040 O-RING (1) and the new AIPC 28-16-06-01-120 SEAL (8) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-16-42-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the Fuel Recirculation Check-Valve

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.

(1) Install the new O-ring (1) on the check valve (2).
(2) Remove the blanking caps from the disconnected lines.
(3) Attach the check valve (2) to the mounting block and install the new AIPC 28-16-05-07-020 TAB WASHERS (6) and the bolts (7).
(4) Bend the ends of the tab washers (6) to lock the bolts (7).
(5) Install the new seal (8) between the check valve (2) and the flange then install the washers (9), the bolts (10) and the plates (11). Safety the bolts (10) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(6) Connect the bonding strip (4) to the bonding lug and install the bolts (3) and the nuts (5) (Ref. AMM TASK 20-28-00-912-802).

Subtask 28-16-42-420-052-B ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Clean the component interfaces and 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.
(4) Lubricate the new AIPC 28-16-05-07-040 O-RING (1) and the new AIPC 28-16-06-01-120 SEAL (9) or AIPC 28-16-86-01-070 SEAL (9) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-16-42-420-050-B ** ON A/C NOT FOR ALL

D. Installation of the Fuel Recirculation Check-Valve

(1) Install the new O-ring (1) on the check valve (2).
(2) Remove the blanking caps from the disconnected lines.
(3) Attach the check valve (2) to the mounting block and install the new AIPC 28-16-05-07-020 TAB WASHERS (7) or AIPC 28-16-85-01-020 TAB WASHERS (7) and the bolts (8).
(4) Bend the ends of the tab washers (7) to lock the bolts (8).
(5) Install the new seal (9) between the check valve (2) and the flange then install the washers (10), the bolts (11) and the plates (12). Safety the bolts (11) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(6) Connect the bonding strips (4) and (5) to the bonding lug and install the bolts (3) and the nuts (6) (Ref. AMM TASK 20-28-00-912-802).

Subtask 28-16-42-710-050-A ** ON A/C NOT FOR ALL

E. Operational Test
(1) Do an operational test of the applicable check valve (Ref. AMM TASK 28-16-00-710-002).

Subtask 28-16-42-710-050-B ** ON A/C NOT FOR ALL

E. Operational Test
(1) Do a leak test of the applicable check valve (Ref. AMM TASK 28-16-00-790-001).

Subtask 28-16-42-710-050-C ** ON A/C NOT FOR ALL

E. Operational Test
(1) Do a leak check of the applicable check valve (Ref. AMM TASK 73-11-50-360-002).

5. Close-up
Subtask 28-16-42-410-050-A ** 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 access panels (Ref. AMM TASK 54-53-11-400-002):
(a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)

Install 471BL.

(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)

Install 482BR.

Subtask 28-16-42-410-050-B ** ON A/C NOT FOR ALL

Install 471CL.

(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)

Install 481CR.

Subtask 28-16-42-410-050-C ** 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 access panels (Ref. AMM TASK 54-53-11-400-804):
(a) FOR [122QM] (CHECK VALVE-FUEL RECIRCULATION, L)

Install 471BL.

(b) FOR [123QM] (CHECK VALVE-FUEL RECIRCULATION, R)

Install 482BR.

Subtask 28-16-42-650-052-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 28-16-42-942-050-A

C. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(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 07:02:18 UTC