R 1EFF : 301-399, 1 28-21-00Page 560 1 1 May 01/04 1 1 1CES 1

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
R R R R 
R R R R  3. Release (out) the L TK PUMP 1 and PUMP 2 (R TK PUMP 1 and PUMP 2) P/BSWs. 
R R R R R  4. After 10 seconds, push (in) the L TK PUMP 2 (R TK PUMP 2) P/BSW. 
R R R R R 
R R R R R  5. Push (in) the L TK PUMP 1 (R TK PUMP 1) P/BSW. 
R R R R 
R R R R  6. Release (out) the L TK PUMP 1 and PUMP 2 (R TK PUMP 1 and PUMP 2) P/BSWs. 

NOTE : If in this step the FAULT light
____ fails to come on momentarily, it shows that the CHECK VALVE 222QM(225QM) has failed open.
In the L TK PUMP 1 and PUMP 2 (R TK PUMP 1 and PUMP 2) P/BSWs:
-
the OFF lights come on.

In the L TK PUMP 2 (R TK PUMP2) P/BSW:

-
the OFF light goes out

-
the FAULT light comes on momentarily and then remains off.

NOTE : In this step fuel pump 2 is used
____ to pressurize the check valve 224QM(223QM) in the reverse direction to the normal fuel flow.
In the L TK PUMP 1 (R TK PUMP 1) P/BSW:
-
the OFF light goes out

-
the FAULT light comes on momentarily and then remains off.

NOTE : If in this step the FAULT light
____ fails to come on momentarily, it shows that the CHECK VALVE 224QM(223QM) has failed open.
In the L TK PUMP 1 and PUMP 2 (R TK PUMP 1 and PUMP 2) P/BSWs:
-the OFF lights come on.
R 1EFF : 301-399, 1 28-21-00Page 561 1 1 May 01/04 1 1 1CES 1R **ON A/C ALL

 5. Close-up
________
 Subtask 28-21-00-860-054

 A. Aircraft Configuration
 (1)
 Do the EIS stop procedure (Ref. TASK 31-60-00-860-002).

 (2)
 De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

 Subtask 28-21-00-942-076
 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.

 1EFF : ALL 1 28-21-00Page 562 1 1 May 01/04 1 1 1CES 1 TASK 28-21-00-710-012

 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.
 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 No specific warning notice
 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 28-00-00-910-001 Fuel Safety Procedures 28-25-00-650-001 Pressure Defuel 28-25-00-869-001 Fuel Transfer 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure
 1EFF : ALL 1 28-21-00Page 563 1 1 May 01/04R 1 1 1CES 1

 3. Job Set-up
__________
 Subtask 28-21-00-941-081

 A. Safety Precautions
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.

_______
 (1)
 You must obey the fuel safety procedures (Ref. TASK 28-00-00-910-001) when you do work on the fuel system.

 (2)
 Put the safety barriers in position.

 (3)
 Put a warning notice 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
 B. Get Access
　
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