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R 
R  (c) If the fault continues, do a check (Ref. ASM 28-25/01) of the 
R  aircraft wiring between: 
R  - the floodlight negative terminal and the ground point 
R  - the floodlight positive terminal and the refuel panel 800VU 
R  connector 4024VC-A, pin L 
R  - the refuel panel 800VU connector 4023VC-A, pin Y and the 
R  relay-14QU, terminal A1 
R  - the relay-14QU, terminal A2 and the C/B-2QU 
R  - the C/B-2QU and relay-14QU, terminal X1 
R  - the relay-14QU, terminal X2 and the refuel panel 800VU 
R  connector 4023VC-A, pin <H 
R 
R  - the refuel panel 800VU connector 4024VC-A, pin <F and the 
R  refuel door panel MSW (20QU), terminal A 
R  - the refuel door panel MSW (20QU), terminal c and the ground 
R  point. 
R 
R  (d) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-
R  00-00). 
R 
R  (e) Do the test given in Para. 3.B.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 230
 Nov 01/04 CES

 TASK 28-25-00-810-806

 

 Defuel/Transfer Failure (Defuel/Transfer Valve Fails to Open)
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
_______ EQUIPMENT THAT IS APPROVED (REFER TO INTERNATIONAL OR NATIONAL SPECIFICATIONS FOR INTRINSICALLY SAFE TEST EQUIPMENT, E.G. EN50-020, UL913 OR EQUIVALENT). TEST EQUIPMENT THAT IS NOT APPROVED CAN CAUSE FIRE OR AN EXPLOSION.
 1. Possible Causes
_______________
 - ACTUATOR-DEFUEL/TRANSFER VALVE (11QU)

 - SW-MODE SELECT/REFUEL/OFF/DEFUEL/XFR (3QU) 800VU

 - RELAY-REFUEL/DEFUEL CTL PNL DOOR POSITION (14QU) 92VU

 - RELAY-DEFUEL/XFR VALVE POSITION (19QU) 92VU

 - aircraft wiring between the ACTUATOR-DEFUEL/XFR VALVE (11QU) supply
 connector pin A, and the SW-MODE SELECT/REFUEL/OFF/DEFUEL/XFR (3QU),
 terminal 3A

 - aircraft wiring between the ACTUATOR-DEFUEL/XFR VALVE (11QU) supply connector pin D, and the RELAY-DEFUEL/XFR VALVE POSITION (19QU), terminal X

 - aircraft wiring between the RELAY-REFUEL/DEFUEL CTL PNL DOOR POSITION (14QU), terminal D1, and the RELAY-DEFUEL/XFR VALVE POSITION (19QU), terminal Z

 - aircraft wiring between the RELAY-REFUEL/DEFUEL CTL PNL DOOR POSITION (14QU), terminal A1, and the ANN LT-DEFUEL/XFR/OPEN (21QU), terminal 4, at 800VU

 - aircraft wiring between the RELAY-DEFUEL/XFR VALVE POSITION (19QU), terminal 1, and the ANN LT-DEFUEL/XFR/OPEN (21QU), terminal I, at 800VU

 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific multimeter
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞28-25-00∞∞∞∞∞∞∞∞∞∞Page 231
 Nov 01/04R
 CES

 

 B. Referenced Information

 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
28-25-00-810-805 Refuel/Defuel Floodlight Failure
 AMM 28-25-00-710-002 Operational Test of the Defuel System
 AMM 28-25-53-000-001 Removal of the Center-Tank Defuel/Transfer

 Valve-Actuator (11QU)
 AMM 28-25-53-400-001 Installation of the Center-Tank Defuel/Transfer
 Valve-Actuator (11QU)

 ASM 28-25/01
 3. Fault Confirmation
__________________
 A. Do the Operational Test of the Defuel System (Ref. AMM TASK 28-25-00-710-002).
 4. Fault Isolation
_______________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 A. If the floodlight-refuel/defuel control-panel door does not operate:
 - go to (Ref. TASK 28-25-00-810-805).
 (1) If the floodlight-refuel/defuel control-panel door operates:

 (a) Make sure the SW-MODE SELECT/REFUEL/OFF/DEFUEL/XFR (3QU) is set to DEFUEL.

 (b) Set the MCDU to CFDS(FUEL), Input Parameters Page 3.

 (c) Examine bit position C6.
　
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