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 4. Procedure
_________ Subtask 28-21-00-710-052
 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 the panel 800VU:
 -make sure that the REFUEL VALVES switches are in the NORM position
 -put the MODE SELECT switch to the OFF position.
 2. On the panel 40VU:
-release (out) the X FEED P/BSW.
3. On the panel 40VU:
-push in the L (R) TK PUMPS 1 and 2 P/BSWs.
On the panel 40VU:
-
the XFEED P/BSW ON and OPEN lights are off.

 On the ECAM lower DU:

 -
the XFEED valve shows closed (green cross-line).

On the panel 40VU:

-
the L (R) TK PUMPS 1 and 2 P/BSWFAULT lights come on momentarily

 -
the L (R) TK PUMPS 1 and 2 P/BSW OFF lights go off.

 On the ECAM lower DU:

 -
the left (right) pump display shows pumps 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
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 -------------------------------------------------------------------------------
ACTION  RESULT
 -------------------------------------------------------------------------------decrease of the fuel in the left (right) wing tank) the check valve in the left (right) fuel canister has failed open.
 4. On the panel 40VU:  On the panel 40VU:
 -release (out) the L (R) TK  - the L (R) TK PUMPS 1 and 2 P/BSW OFF PUMPS 1 and 2 P/BSWs. lights come on.
 5. Close-up
________ Subtask 28-21-00-860-056
 A. Aircraft Maintenance Configuration
 (1)
 Refuel, defuel or transfer fuel as necessary (Ref. TASK 12-11-28-650-003), (Ref. TASK 28-25-00-650-001) or (Ref. TASK 28-25-00-869-001).

 (2)
 Do the EIS stop procedure (Ref. TASK 31-60-00-860-002).

 (3)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 Subtask 28-21-00-942-077
 B. Removal of Equipment
 (1)
 Make sure that the work area is clean and clear of tool(s) 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.

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 TASK 28-21-00-710-004
 Operational Test of the Suction and the Air Release 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.
 WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______ GEAR.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific safety barriers
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-11-28-650-003 Pressure Refuel with Automatic Control 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 28-21-00-710-006 Operational Test of the Fuel Flow through the Fuel
 Pumps with Gravity Feed 28-25-00-650-001 Pressure Defuel 28-25-00-869-001 Fuel Transfer 31-60-00-860-001 EIS Start Procedure
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 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
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