W DOC AIRBUS | AMM A320F

Operational Test of the Wing-Tank Pump-Canister Check-Valves

TASK 28-21-00-710-012-A
Operational Test of the Wing-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: 211
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)
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
211
COCKPIT
622KB
192MB
 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 28-00-00-910-001-A
Fuel Safety Procedures
TASK 28-25-00-650-001-A
Pressure Defuel
TASK 28-25-00-869-001-A
Fuel Transfer
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 28-21-00-941-081-A
A. Safety Precautions
WARNING: OBEY THE FUEL SAFETY PROCEDURES.
   (1) You must obey the fuel safety procedures when you work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
   (2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
   (3) Put a WARNING NOTICE(S) in position on the flight deck to tell persons not to operate the main booster pumps or crossfeed valve.
Subtask 28-21-00-010-057-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the access door 192MB.
NOTE: If operating in battery power:
  • put the MODE SELECT switch to the OFF and guarded position
  • do not keep the door open longer than necessary because the battery can discharge.
Subtask 28-21-00-010-057-B ** ON A/C NOT FOR ALL
B. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT) in position below zone 622.
   (2) Open the access door 622KB.
NOTE: If operating in battery power:
  • put the MODE SELECT switch to the OFF and guarded position
  • do not keep the door open longer than necessary because the battery can discharge.
Subtask 28-21-00-860-091-A ** ON A/C NOT FOR ALL
C. 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 (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001), then:
  • On the ECAM control panel, push (in) the FUEL pushbutton switch and 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 to get these quantities:
  • The left wing and the right wing tank inner-cells contain a minimum of 1000 kg (2204.6220 lb) and a maximum of 4300 kg (9479.8746 lb).
Subtask 28-21-00-860-091-B ** ON A/C NOT FOR ALL
C. 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 (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001), then:
  • On the ECAM control panel, push (in) the FUEL pushbutton switch and 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 to get these quantities:
  • The center tank contains a minimum fuel quantity of 1000 kg (2204.6220 lb)
  • The left wing and the right wing tank inner-cells contain a minimum of 1000 kg (2204.6220 lb) and maximum of 4300 kg (9479.8746 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 28-21-00-710-073-B ** ON A/C NOT FOR ALL
A. Operational Test of the Wing-Tank Pump-Canister Check-Valves
NOTE: This test is for check valves 149QM, 150QM, 151QM and 152QM installed in the left and right wing-tank fuel-pump-canisters.

   (1) Do the test that follows:

ACTION
RESULT
1.On refuel/defuel control-panel 800VU:
  • Make sure that the REFUEL VALVES switches are in the NORM and guarded position.
  • Make sure that the MODE SELECT switch is in the OFF and guarded 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 X FEED pushbutton switch is ON and the OPEN lights are off.

On the ECAM lower DU:
  • The X FEED valve indicator shows that the valve is in the closed position (green cross-line).
3.On fuel panel 40VU:
  • Push (in) the CTR TK PUMPS 1 and 2 pushbutton switches.
On fuel panel 40VU:
  • The FAULT lights of the CTR TK PUMPS 1 and 2 pushbutton switches come on momentarily.
  • The CTR TK PUMPS 1 and 2 pushbutton switches are on (the OFF lights go off).

On the ECAM lower DU:
  • The CTR TK pump indicator shows that the pumps are on (green in-line).

    After 20 mins:
  • The fuel quantities in the left (right) wing tank and the center tank stay the same.

    or

  • If the fuel quantity in the left (right) wing tank increases by more than 50 kg (110.2311 lb) (with a decrease of fuel in the center tank), one or two of the check valve(s) in the left (right) wing-tank fuel-pump canister(s) is (are) defective.
4.On fuel panel 40VU:
  • Release (out) the CTR TK PUMPS 1 and 2 pushbutton switches.
On fuel panel 40VU:
  • The CTR TK PUMPS 1 and 2 pushbutton switches are OFF (the OFF lights are on).
Subtask 28-21-00-710-073-C ** ON A/C NOT FOR ALL
A. Operational Test of the Wing-Tank Pump-Canister Check-Valves
NOTE: After you complete the maintenance procedure that follows:
  • There is a risk of surge tank overflow if the MODE SEL (4QL) pushbutton switch stays in the MAN mode.
NOTE: This test is for check valves 149QM, 150QM, 151QM and 152QM installed in the left and right wing-tank fuel-pump-canisters.

   (1) Do the test that follows:

ACTION
RESULT
1.On refuel/defuel control-panel 800VU:
  • Make sure that the REFUEL VALVES switches are in the NORM and guarded position.
  • Make sure that the MODE SELECT switch is in the OFF and guarded position.

2.On fuel control-panel 40VU:
  • Push (in) the X FEED pushbutton switch.
On fuel control-panel 40VU:
  • The X FEED pushbutton switch is ON and the OPEN lights come on.
On the ECAM lower DU:
  • The X FEED valve indicator shows that the valve is in the open position (green in-line).
3.On fuel control-panel 40VU:
  • Push (in) the L TK PUMPS 1 and 2 pushbutton switches.
On fuel control-panel 40VU:
  • The FAULT lights of the CTR TK PUMPS 1 and 2 pushbutton switches come on momentarily.
  • The L TK PUMPS 1 and 2 pushbutton switches are ON (the OFF lights go off).
On the ECAM lower DU:
  • The LEFT pump indicator shows that the pumps are on (green in-line).

    After 20 mins:
  • The fuel quantities in the left wing tank and the right wing tank stay the same.

    or

  • If the fuel quantity in the right wing tank increases by more than 50 kg (110.2311 lb) (with a decrease of fuel in the left wing tank), the check valve(s) in right fuel-pump canister(s) 3QM and/or 4QM is (are) defective.
4.On fuel control-panel 40VU:
  • Release (out) the L TK PUMPS 1 and 2 pushbutton switches.
On fuel control-panel 40VU:
  • The L TK PUMPS 1 and 2 pushbutton switches are OFF (the OFF lights are on).
5.On fuel control-panel 40VU:
  • Push (in) the R TK PUMPS 1 and 2 pushbutton switches.
On fuel control-panel 40VU:
  • The FAULT lights of the R TK PUMPS 1 and 2 pushbutton switches come on momentarily.
  • The R TK PUMPS 1 and 2 pushbutton switches are on (the OFF lights go off).
On the ECAM lower DU:
  • The RIGHT pump indicator shows that the pumps are on (green in-line).

    After 20 mins:
  • The fuel quantities in the right wing tank and the left wing tank stay the same.

    or

  • If the fuel quantity in the left wing tank increases by more than 50 kg (110.2311 lb) (with a decrease of fuel in the right wing tank), the check valve(s) in left fuel-pump canister(s) 1QM and/or 2QM is (are) defective.
6.On fuel control-panel 40VU:
  • Release (out) the R TK PUMPS 1 and 2 pushbutton switches.
On fuel control-panel 40VU:
  • The R TK PUMPS 1 and 2 pushbutton switches are OFF (the OFF lights are on).
7.On fuel control-panel 40VU:
  • Release (out) the R TK PUMPS 1 and 2 pushbutton switches.
On fuel control-panel 40VU:
  • The R TK PUMPS 1 and 2 pushbutton switches are OFF (the OFF lights are on).
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.
8.On fuel control-panel 40VU:
  • Release (out) the X FEED pushbutton switch.
On fuel control-panel 40VU:
  • The X FEED pushbutton switch is ON and the OPEN lights go off.
On the ECAM lower DU:
  • The X FEED valve indicator shows that the valve is in the closed position (green cross-line).
5. Close-up
Subtask 28-21-00-860-092-A
A. Aircraft 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 28-21-00-410-057-B ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access door 622KB.
Subtask 28-21-00-410-057-D ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the access door 192MB.
Subtask 28-21-00-942-085-A
C. 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
"WTRUIB" 2025