Removal of the ACT Fuel-Transfer-Pump Mounting-Plate

TASK 28-28-31-000-001-A
Removal of the ACT Fuel-Transfer-Pump Mounting-Plate

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: OBEY THE FUEL SAFETY PROCEDURES.

ZONE: 142
ZONE: 150
ZONE: 152
FIN: 163QM ** 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 2M (6 FT)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
142	WING CENTER BOX
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
152	AFT CARGO COMPARTMENT
148AZ

C. Referenced Information

REFERENCE	DESIGNATION
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 28-00-00-910-001-A	Fuel Safety Procedures
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 28-28-51-000-001-A	Removal of the ACT Fuel-Transfer Pump-Element
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 57-17-11-000-001-B	Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
TASK 57-17-11-000-003-A	Removal of the Protective Cover of the ACT-Equipment Support Door
ACT Fuel-Transfer-Pump Mounting-Plate ** ON A/C NOT FOR ALL
ACT Fuel-Transfer-Pump Mounting-Plate ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-28-31-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the APU section of overhead panel 25VU, make sure that the APU/MASTER SW pushbutton switch is released (the ON legend is off).
(3) On the FUEL section of HYD/FUEL panel 40VU, make sure that all the L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
(4) Put the WARNING NOTICE(S) in position:

On the APU section of overhead panel 25VU to tell persons not to operate the APU/MASTER SW pushbutton switch
On the FUEL section of panel 40VU to tell persons not to operate the fuel system
On the ENG/APU FIRE panel on overhead panel 20VU to tell persons not to operate the fire extinguishing system
On the Additional Center Tank (ACT) section of control panel 28VU to tell persons not to operate the fuel system.

(5) You must obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001) when you do work on the fuel system.
(6) Put a WARNING NOTICE(S) in position to tell persons not to operate the MLG doors.

Subtask 28-28-31-650-051-A ** ON A/C NOT FOR ALL

B. Defuel the center tank (Ref. AMM TASK 28-25-00-650-001).

Subtask 28-28-31-865-050-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

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
121VU	ACT PUMP SUPPLY	25QH	Q29
** ON A/C NOT FOR ALL
121VU	FUEL/RFL/DFL/SPLY	2QU	L23
121VU	FUEL/RFL/DFL/XFR/DEFUEL/VALVE	1QU	L22
121VU	FUEL/ACT/FUEL PUMP/SPLY	25QH	Q29

Subtask 28-28-31-010-050-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the right MLG door.
(3) Remove the protective cover of the ACT-equipment support door (Ref. AMM TASK 57-17-11-000-003).

Subtask 28-28-31-020-051-A ** ON A/C NOT FOR ALL

E. Preparation for Removal
(1) Remove the ACT fuel-transfer pump-element (Ref. AMM TASK 28-28-51-000-001).

Subtask 28-28-31-010-051-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Get access to the fuel center tank (Ref. AMM TASK 28-10-00-910-002):

Remove access cover 148AZ (Ref. AMM TASK 57-17-11-000-001).

4. Procedure
Subtask 28-28-31-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Mounting Plate
(1) Remove the nut (3), the washer (5) and the bolt (6) to disengage the bonding strap (4).
(2) Remove the nuts (9), the washers (10) and the bolts (11) to disengage the Tee-union (12).
(3) Remove the bolt (15) and the washer (16).
(4) Disconnect the pipe (14).
(5) Remove and discard the packing (13).
(6) Remove the bolts (17) and the nuts (19) to disengage the pipe (18).
(7) Loosen the nut (20) and disengage the pipe (21).
(8) Remove and discard the O-ring (22).
(9) Remove the six bolts (1) and the six washers (2) and disengage the canister (8).
(10) Remove and discard the packing (7).
(11) Put the PLUG-BLANKING in each disconnected line end.

Subtask 28-28-31-020-050-F ** ON A/C NOT FOR ALL

A. Removal of the ACT Fuel-Transfer-Pump Mounting-Plate
(1) Remove the nut (29), the washer (28) and the bolt (26) and disconnect the bonding strap (27) from the ACT fuel-transfer-pump mounting-plate (25).
(2) Remove the nut (30) and the bolt (32) and disconnect the bonding strap (31) from the pipe (21).
(3) Remove the nut (7), the washer (8) and the bolt (11) and disconnect the bonding strap (10) from the elbow (9).
(4) Loosen the union (22) and the union (18).
(5) Disconnect the pipe (21) from the union (18) and the connection bulkhead (23).
(6) Remove the union (19) from the ACT fuel-transfer-pump mounting-plate (25).
(7) Remove and discard the O-ring (20).
(8) Loosen the nut (16) and disconnect the pipe (15) from the ACT fuel-transfer-pump mounting-plate (25).
(9) Remove and discard the O-ring (17).
(10) Remove the nuts (24) and the bolts (12) and disconnect the bonding strap (13) from the pipe (14).
(11) Disconnect the pipe (14) from the ACT fuel-transfer-pump mounting-plate (25).
(12) Hold the elbow (9) and remove the bolts (6) and the washers (5).
(13) Carefully remove the elbow (9) from the ACT fuel-transfer-pump mounting-plate (25).
(14) Remove and discard the O-ring (4).
(15) Hold the ACT fuel-transfer-pump mounting-plate (25) and remove the bolts (1) and the washers (2).
(16) Remove the ACT fuel-transfer-pump mounting-plate (25) from the structure.
(17) Remove and discard the O-ring (3).
(18) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 12:52:17 UTC