Installation of the Fuel Pumps

TASK 28-21-51-400-002-A
Installation of the Fuel Pumps

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: 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: 37QA ** ON A/C NOT FOR ALL
FIN: 38QA ** 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	1	ACCESS PLATFORM 3M (10 FT)
No specific	AR	CONTAINER 3 L(3/4 USGAL)
No specific	1	SAFETY BARRIER(S)
No specific	Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
558-1-05903	1	EXTRACTOR - FUEL PUMP
558-1-05903-002	1	EXTRACTOR - FUEL PUMP

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 [37QA] (PUMP-FUEL NO 1, CTR TK)
195BB
FOR [38QA] (PUMP-FUEL NO 2, CTR TK)
196BB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	O-RING	AIPC 28-21-51-01-010
10	O-RING	AIPC 28-21-51-01-020
9	O-RING	AIPC 28-21-51-01-020
7	O-RING	AIPC 28-21-51-01-100

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 20-28-00-720-006-A	Check of the Electrical Bonding of the Fluid Systems
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
ESPM 205120
Fuel Pump 37QA(38QA) - Location and Detail
Fuel Pump Extractor Tool

3. Job Set-up
Subtask 28-21-51-941-060-A ** ON A/C NOT FOR ALL

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)S are in position.

Subtask 28-21-51-865-134-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
FOR FIN: 37QA (PUMPFUEL NO 1, CTR TK)
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
FOR FIN: 38QA (PUMPFUEL NO 2, CTR TK)
121VU	FUEL/CTR TK/PUMP2 SPLY	30QA	P26

Subtask 28-21-51-860-052-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 3M (10 FT) is below the applicable zone 141(142).
(2) Make sure that applicable access panel 195BB(196BB) is open.
(3) Make sure that the CONTAINER 3 L(3/4 USGAL) is below the applicable fuel pump canister.

4. Procedure

WARNING: WHEN YOU OPERATE THE FUEL PUMPS DURING A MAINTENANCE PROCEDURE, A MAINTENANCE PERSON MUST BE IN THE COCKPIT. THIS PERSON MUST STOP THE PUMPS WHEN THE LOW PRESSURE FAULT LIGHT(S) (ON PANEL 40VU) COME ON, TO PREVENT OPERATION OF THE PUMPS(S) WITHOUT FUEL ('DRY RUNNING'). OPERATION OF THE PUMPS WITHOUT FUEL CAN CAUSE A FIRE.

Subtask 28-21-51-420-056-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) Lubricate the new parts that follow with Turbine Fuel-- Kerosene - (Material No.01ABA1) or Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(5) Install the new O-rings (1), (9) and (10) on the fuel pump (2).
(6) If you install the fuel pump that you removed, do this procedure:
(a) Install the new O-ring (7) on the drain bolt (6).

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.

(b) Install the drain bolt (6), then:

safety the drain bolt (6) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

(7) Lubricate the fuel pump (2), the slide valve and the pump canister with Turbine Fuel-- Kerosene - (Material No.01ABA1) .

Subtask 28-21-51-420-057-A ** ON A/C NOT FOR ALL

B. installation of the Fuel Pump 37QA(38QA)

CAUTION: MAKE SURE THAT THE RETAINER BAULK ARM STAYS IN THE UNLOCKED (OPEN) POSITION. THIS WILL PREVENT ACCIDENTAL MOVEMENT OF THE SLIDE-VALVE WHICH CAN CAUSE LEAKAGE OF FUEL FROM THE FUEL TANK.

(1) Make sure the pump retainer baulk-arm (11) is in the unlocked (open) position. This gives clearance for the fuel pump (2) to be installed into the slide valve.
(2) Make sure that the pump electrical receptacle (12) is in the same position that you recorded.
(3) Install the 558-1-05903 EXTRACTOR - FUEL PUMP or the 558-1-05903-002 EXTRACTOR - FUEL PUMP on the applicable fuel pump (2) and slide valve assembly.
(4) Align and install the fuel pump (2) in the slide valve.
(5) Use the 558-1-05903 EXTRACTOR - FUEL PUMP to turn the fuel pump (2) and slide valve clockwise to align with the stop-pin location hole.
(6) Make sure that the fuel pump (2) flange slot engages with the retainer pin and spring assembly.
(7) Turn the fuel pump retainer baulk-arm (11) to the locked (closed) position.
(8) Remove the 558-1-05903 EXTRACTOR - FUEL PUMP from the fuel pump (2) and the slide valve assembly.
(9) Push the fuel pump (2) and the slide-valve fully into the fuel pump canister.
(10) Install the bolts (3).
(11) Torque the bolts (3) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(12) Install the bolts (5) in the fuel pump (2), the slide-valve and the fuel pump canister assemblies.
(13) Torque the bolts (5) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )

.
(14) Remove the blanking caps from the electrical connector and receptacle.
(15) Connect the electrical connector to the pump electrical receptacle (12).

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 check of the electrical bonding between the fuel pump (2) and the tank structure (Ref. AMM TASK 20-28-00-720-006).
(16) Apply sealant on the bolts (3) ESPM 205120.

Subtask 28-21-51-860-054-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical network (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the slats are retracted (Ref. AMM TASK 27-80-00-866-005).
(3) Make sure that the center tank contains a minimum of 1000 kg (2204.6220 lb) of fuel. If necessary refuel the center tank (Ref. AMM TASK 12-11-28-650-003).

Subtask 28-21-51-790-055-A ** ON A/C NOT FOR ALL

D. Leak Test
(1) Examine the fuel pump (2), the slide-valve and the fuel pump canister for leaks.

Subtask 28-21-51-865-138-A ** ON A/C NOT FOR ALL

E. 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
FOR FIN: 37QA (PUMPFUEL NO 1, CTR TK)
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
FOR FIN: 38QA (PUMPFUEL NO 2, CTR TK)
121VU	FUEL/CTR TK/PUMP2 SPLY	30QA	P26

Subtask 28-21-51-710-052-A ** ON A/C NOT FOR ALL

F. Operational Test
(1) Do this test:

ACTION	RESULT
On panel 40VU:	On panel 40VU:
1.Push (in) the MODE SEL pushbutton switch (P/BSW).	the MODE SEL P/BSW MAN light goes off.
2.Start the applicable fuel pump:
for 37QA, push (in) the CTR TK PUMPS 1 P/BSW	the CTR TK PUMPS 1 P/BSW OFF light goes off the CTR TK PUMPS 1 P/BSW FAULT light comes on momentarily
for 38QA, push (in) the CTR TK PUMPS 2 P/BSW.	the CTR TK PUMPS 2 P/BSW OFF light goes off the CTR TK PUMPS 2 P/BSW FAULT light comes on momentarily.
3.Stop the applicable fuel pump:
for 37QA, release (out) the CTR TK PUMPS 1 P/BSW	the CTR TK PUMPS 1 P/BSW OFF light comes on

for 38QA, release (out) the CTR TK PUMPS 2 P/BSW.	the CTR TK PUMPS 2 P/BSW OFF light comes on.
4.Release (out) the MODE SEL P/BSW.	the MODE SEL P/BSW MAN light comes on.

5. Close-up
Subtask 28-21-51-410-050-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) Close the applicable access door on the access panel 195AB(196AB).
(a) FOR [37QA] (PUMP-FUEL NO 1, CTR TK)
close 195BB
(b) FOR [38QA] (PUMP-FUEL NO 2, CTR TK)
close 196BB.

Subtask 28-21-51-860-053-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance 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).
(2) De-energize the aircraft electrical network (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-51-942-053-A ** ON A/C NOT FOR ALL

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 06:17:27 UTC