Operational Check of Center Tank Pump Canister Check Valves

TASK 28-21-00-710-003-A
Operational Check of Center Tank Pump Canister Check Valves

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

ZONE: 140
ZONE: 211

1. Reason for the Job
Refer to the MPD TASK: 282100-02
OPERATIONAL CHECK OF CENTER TANK PUMP CANISTER CHECK VALVES
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
140	CENTER WING
211	COCKPIT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 28-21-00-941-072-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-21-00-860-055-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001), then:

on the ECAM control panel (CP), push (in) the FUEL push icon switch
make sure that the FUEL page is shown on the ECAM lower Display Unit (DU).

(3) Refuel (Ref. AMM TASK 12-11-28-650-003), defuel (Ref. AMM TASK 28-25-00-650-001) or transfer fuel (Ref. AMM TASK 28-25-00-869-001) as necessary until:

the center tank contains a minimum of 500 kg (1102 lb) and a maximum of 4800 kg (10582 lb)
the left wing and the right wing tank inner-cells contain a minimum of 750 kg (1653 lb).

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 28-21-00-710-052-A ** ON A/C NOT FOR ALL

A. Operational Check of the Center-Tank Pump-Canister Check-Valves

NOTE: This test is for 84QM. For 85QM use the indications in parenthesis.

ACTION	RESULT
1.On refuel/defuel control-panel 800VU: Make sure that the REFUEL VALVES switches are in the NORM position Put the MODE SELECT switch to the OFF position.
CAUTION: BEFORE YOU CLOSE THE CROSSFEED VALVE, MAKE SURE THAT THE FUEL PUMP(S) IS(ARE) OFF. THIS WILL PREVENT DAMAGE TO THE CROSSFEED VALVE. 2.On fuel panel 40VU: Release (out) the X FEED pushbutton switch.	On fuel panel 40VU: The ON light goes off The OPEN light goes off. On the ECAM lower DU: The X FEED valve shows closed (green cross-line).
3.On fuel panel 40VU: Push (in) the L (R) TK PUMPS 1 and 2 pushbutton switches.	On fuel panel 40VU: The L (R) TK PUMPS 1 and 2 pushbutton switches FAULT lights come on momentarily The L (R) TK PUMPS 1 and 2 pushbutton switches OFF lights go off. On the ECAM lower DU: The left (right) pump display shows pumps is (are) on (green in-line). After 10 mins: The fuel quantities in the left (right) wing tank and the center tank stay the same or If the fuel quantity in the center tank increases (with a corresponding decrease of the fuel in the left (right) wing tank), the check valve in the left (right) fuel canister has failed open.
4.On fuel panel 40VU: Release (out) the L (R) TK PUMPS 1 and 2 pushbutton switches.	On fuel panel 40VU: The L (R) TK PUMPS 1 and 2 pushbutton switches OFF lights come on.

5. Close-up
Subtask 28-21-00-860-056-A ** ON A/C NOT FOR ALL

A. 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) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 28-21-00-942-077-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:23 UTC