- is not shown, go to step (4)

 - is shown, do Para. 4.A.

 (4) AIRBUS recommends:
 (a) If the two functional tests (in steps (2) and (3)) show NO FAULTS, the FLSCU-1 7QJ and the FLSCU-2 9QJ are not replaced.

 (b) No more work steps are necessary.

 4. Fault Isolation
_______________
 A. Procedure
 (1) Get access to the ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) (Ref. AMM TASK 28-15-51-000-002).

 (2) Disconnect the electrical connector 12QP-A from the ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP).

 (3) With a multimeter check to see if 28VDC is available at pin B of the actuator electrical supply cable connector (Ref. ASM 28-15/01).

 (4) If the 28VDC is available check/replace the ACTUATOR-TRANSFER VALVE,R REAR SPAR (12QP), (Ref. AMM TASK 28-15-51-000-002), and (Ref. AMM TASK 28-15-51-400-002).

 (a) When the actuator is removed from the aircraft make sure that the transfer valve drive shaft and valve are free to rotate.

 (b) Repair/replace any unserviceable items found in (a).

 (5) If the 28VDC is not available at pin B of the actuator electrical supply cable connector 12QP-A.

 (a) Check with a multimeter to make sure that 28VDC is available at:

 - terminal A2, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP)

 - terminal X1, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP).

 (b) If the 28VDC is not available do a wiring check (Ref. ASM 28-15/01) of the aircraft wiring between the RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) terminals A2, X1, and the C/B-FUEL/XFR VALVE 1/WING/L (1QP).

 (c) Repair all the unserviceable wiring and connectors (Ref. ESPM 20-00-00).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 235
 201-299, 401-499, Aug 01/05 CES

 (d) Check with a multimeter to make sure that 28VDC is available at:

 - terminal A2, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP)

 - terminal X1, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP).

 (e) If the 28VDC is not available do a wiring check (Ref. ASM 28-15/01) of the aircraft wiring between the RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) terminals A2, X1, and the C/B-FUEL/XFR VALVE 1/WING/R (2QP).

 (f) Repair all the unserviceable wiring and connectors.

 (6) Do the test given in Para 3.B.

 (7) If the fault continues, check/replace the RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) 103VU.

 (8) Do the test given in Para 3.B.

 (9) If the fault continues check/replace the RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) 103VU.

 (10) Do the test given in Para 3.B.

 (11) If the fault continues check/replace the RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP) 103VU.

 (12) Do the test given in Para 3.B.

 (13) If the fault continues do a wiring check (Ref. ASM 28-15/01) of the aircraft wiring between:

 - the pin B, ACTUATOR-TRANSFER VALVE, R REAR SPAR (12QP) and the terminal B1, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP)

 - the terminal B2, RELAY-L WING TK LOW LEVEL CHANNEL (5QP) and the terminal A1, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP)

 - the terminal X2, RELAY-L WING TK LOW LEVEL CHANNEL A (5QP) and the terminal A, RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP)

 - the terminal X2, RELAY-R WING TK LOW LEVEL CHANNEL B (6QP) and the terminal B, RELAY-L OR R REAR XFR VALVE OPEN LATCH (13QP)

 - the terminal 1, RELAY-L OR R REAR OPEN LATCH (13QP) and the pin 5A, connector AA, FLSCU-1 (7QJ)

 - the terminal 3, RELAY-L OR R REAR OPEN LATCH (13QP) and the pin 5A, connector AA, FLSCU-2 (9QJ)

 - the pin 1A, connector AA, FLSCU-1 (7QJ) and the C/B-FUEL/XFR VALVE 1/WING/L (1QP)

 - the pin 1A, connector AA, FLSCU-2 (9QJ) and the C/B-FUEL/XFR VALVE 1/WING/R (2QP).

 (14) Repair all the unserviceable wiring and connectors.

 (15) Do the test given in Para 3.B.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-149, 151-199, ∞∞28-15-00∞∞∞∞∞∞∞∞∞∞Page 236
 201-299, 401-499, Aug 01/05 CES

 TASK 28-15-00-810-811

 Intercell XFR Valves (Left And Right Forward) - Fail To Latch At Fuel Low Level
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 WARNING : WHEN YOU DO WORK ON THE FUEL SYSTEM WIRING, YOU MUST USE TEST
　
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本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 FUEL 燃油1(35)