Installation of the Fuel-Pump Check-Valve

TASK 28-21-43-400-002-A
Installation of the Fuel-Pump Check-Valve

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

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.

FIN: 149QM ** ON A/C NOT FOR ALL
FIN: 150QM ** ON A/C NOT FOR ALL
FIN: 151QM ** ON A/C NOT FOR ALL
FIN: 152QM ** ON A/C NOT FOR ALL

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.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -
FOR [149QM] (CHECK VALVE)
FOR [152QM] (CHECK VALVE)
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
FOR [150QM] (CHECK VALVE)
FOR [151QM] (CHECK VALVE)
(Material No.01ABA1)	Turbine Fuel-- Kerosene -
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
540BZ, 640BZ
540AB, 640AB
FOR [149QM] (CHECK VALVE)
FOR [150QM] (CHECK VALVE)
540AB
540BZ
FOR [151QM] (CHECK VALVE)
FOR [152QM] (CHECK VALVE)
640AB
640BZ

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
FOR [149QM] (CHECK VALVE)
FOR [152QM] (CHECK VALVE)
6	O-RING	AIPC 28-21-05-31-030
8	O-RING	AIPC 28-21-05-35-070
6	O-RING	AIPC 28-21-85-25-030
8	O-RING	AIPC 28-21-85-26-070
FOR [150QM] (CHECK VALVE)
FOR [151QM] (CHECK VALVE)
6	O-RING	AIPC 28-21-05-31-030
8	O-RING	AIPC 28-21-05-35-120
6	O-RING	AIPC 28-21-85-25-030
8	O-RING	AIPC 28-21-85-26-070

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 28-00-00-400-001-A	Installation of the Fuel Pipes
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 28-21-00-710-001-A	Operational Test of the Wing-Tank Fuel Control
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 57-27-12-400-002-A	Installation of the Rib 2 Access Panel 540AZ (640AZ) or 540BZ (640BZ)
Fuel-Pump Check-Valve 149QM(152QM), 150QM(151QM)
FOR [149QM] (CHECK VALVE)
FOR [150QM] (CHECK VALVE)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
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)
FOR [151QM] (CHECK VALVE)
FOR [152QM] (CHECK VALVE)
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
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)

3. Job Set-up
Subtask 28-21-43-941-056-A ** ON A/C NOT FOR ALL

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 28-21-43-865-053-A ** ON A/C NOT FOR ALL

B. 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/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
123VU	L WING TK/PUMP 1/STBY SPLY	11QA	AD12
123VU	R WING TK/PUMP 1/STBY SPLY	12QA	AE12

Subtask 28-21-43-860-052-A ** ON A/C NOT FOR ALL

C. 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 wing access panel is removed (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-000-001):
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
access panel 540AB
(b) FOR [152QM] (CHECK VALVE), [151QM] (CHECK VALVE)
access panel 640AB.
(5) Make sure that the applicable RIB2 surge door is open:
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
open the surge door 540BZ
(b) FOR [152QM] (CHECK VALVE), [151QM] (CHECK VALVE)
open the surge door 640BZ.
(6) Make sure that the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) is on the applicable RIB2 surge door.

Subtask 28-21-43-860-052-B ** ON A/C NOT FOR ALL

C. 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 ACCESS PLATFORM 3M (10 FT) is below the applicable access panel 540AB( 640AB).
(4) Make sure that the applicable wing access panels are removed:
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
Remove 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(b) FOR [152QM] (CHECK VALVE), [151QM] (CHECK VALVE)
Remove 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-000-001).
(5) Make sure that RIB2 access panels are removed:
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
Remove 540BZ (Ref. AMM TASK 57-27-12-000-002).
(b) FOR [152QM] (CHECK VALVE), [151QM] (CHECK VALVE)
Remove 640BZ (Ref. AMM TASK 57-27-12-000-002).

4. Procedure
Subtask 28-21-43-420-053-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) 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) FOR [149QM] (CHECK VALVE), [152QM] (CHECK VALVE)

lubricate the new AIPC 28-21-05-31-030 O-RING (6) and the new AIPC 28-21-05-35-070 O-RING (8) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

(5) FOR [150QM] (CHECK VALVE), [151QM] (CHECK VALVE)

lubricate the new AIPC 28-21-05-31-030 O-RING (6) and the new AIPC 28-21-05-35-120 O-RING (8) with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-21-43-420-053-C ** ON A/C NOT FOR ALL

Lubricate the new AIPC 28-21-05-31-030 O-RING (6) or AIPC 28-21-85-25-030 O-RING (6) and the new AIPC 28-21-05-35-070 O-RING (8) or AIPC 28-21-85-26-070 O-RING (8) with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

(5) FOR [150QM] (CHECK VALVE), [151QM] (CHECK VALVE)

Lubricate the new AIPC 28-21-05-31-030 O-RING (6) or AIPC 28-21-85-25-030 O-RING (6) and the new AIPC 28-21-05-35-120 O-RING (8) or AIPC 28-21-85-26-070 O-RING (8) with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) .

Subtask 28-21-43-420-051-A ** ON A/C NOT FOR ALL

B. Installation of the Fuel-Pump Check-Valve 149QM(152QM), 150QM(151QM)
(1) Install the O-ring (6) on the check valve (5).
(2) Install the O-ring (8) on the fuel pipe (9).
(3) Install the check valve (5) on the related fuel pump canister. Make sure that the TOP legend on the check valve is at the top of fuel pump canister.
(4) Install and tighten the bolts (4).

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.

(5) Do a bonding check (Ref. AMM TASK 20-28-00-912-802).
(6) Put the fuel pipe (9) in position on the check valve (5).
(7) Install the fuel pipes that you removed for access (Ref. AMM TASK 28-00-00-400-001).
(8) Install the bolts (7) and the nuts (10). Tighten the nuts (10).
(9) Install the bolt (3), the bonding strap (2) and the nut (1) (Ref. AMM TASK 20-28-00-912-802).

Subtask 28-21-43-410-051-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) Remove the 98D57004014000 HOOK-COVER (RIB2-SURGE DOORS) from the applicable spring-loaded surge door 540BZ 640BZ. Make sure that the applicable spring-loaded surge door closes correctly.
(3) Install the applicable access panel (Ref. AMM TASK 28-10-00-910-002), (Ref. AMM TASK 57-27-11-400-001):
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
install 540AB
(b) FOR [151QM] (CHECK VALVE), [152QM] (CHECK VALVE)
install 640AB.

Subtask 28-21-43-410-051-B ** 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 RIB2 access panels:

For the left wing, install 540BZ (Ref. AMM TASK 57-27-12-400-002)
For the right wing, install 640BZ (Ref. AMM TASK 57-27-12-400-002).

(3) Install the applicable access panels:
(a) FOR [149QM] (CHECK VALVE), [150QM] (CHECK VALVE)
Install 540AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).
(b) FOR [151QM] (CHECK VALVE), [152QM] (CHECK VALVE)
Install 640AB (Ref. AMM TASK 28-10-00-910-002) and (Ref. AMM TASK 57-27-11-400-001).

Subtask 28-21-43-865-054-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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
123VU	L WING TK/PUMP 1/STBY SPLY	11QA	AD12
123VU	R WING TK/PUMP 1/STBY SPLY	12QA	AE12

Subtask 28-21-43-710-050-A ** ON A/C NOT FOR ALL

E. Test
(1) Do an operational test of the main fuel pump system (Ref. AMM TASK 28-21-00-710-001).

5. Close-up
Subtask 28-21-43-650-053-A ** ON A/C NOT FOR ALL

A. 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 28-21-43-942-053-A ** ON A/C NOT FOR ALL

B. 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 06:17:25 UTC