W DOC AIRBUS | TSM A320F

Failure of the F/O MASTER CAUT Light

TASK 31-53-00-810-919-A
Failure of the F/O MASTER CAUT Light

1. Possible Causes
  • LT-MASTER CAUT, F/O (11WW2)
  • wiring
  • FWC-2 [1WW2]
  • FWC-1 [1WW1]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-50-00-710-003
Operational Test of the System Data Acquisition Concentrator (SDAC)
ASM 315206
AMM 31-53-34-000-001
Removal of the Flight Warning Computer (FWC)
AMM 31-53-34-400-001
Installation of the Flight Warning Computer (FWC)
AMM 33-14-00-710-001
Operational Test of the Lights
3. Fault Confirmation
Subtask 31-53-00-710-269-A
A. Test
Do the operational test of the System Data Acquisition Concentrator AMM 31-50-00-710-003.
4. Fault Isolation
Subtask 31-53-00-810-171-A
A. If the upper section of the F/O MASTER CAUT light does not come on:
   (1) If the upper section of the F/O MASTER CAUT light stays off:
  • replace the LT-MASTER CAUT, F/O (11WW2).
     (a) If the fault continues:
  • do a check and repair the wiring from F/O MASTER CAUT light (11WW2) pin A/7 to the first terminal block ASM 315206.
   (2) If the upper section of the F/O MASTER CAUT light comes on:
     (a) If the fault continues:
  • do a check and repair the wiring from FWC2 (1WW2) pin AE/2A to the first terminal block ASM 315206.
Subtask 31-53-00-810-172-A
B. If the lower section of the F/O MASTER CAUT light does not come on:
   (1) If the lower section of the F/O MASTER CAUT light stays off:
  • replace the LT-MASTER CAUT, F/O (11WW2).
     (a) If the fault continues:
  • do a check and repair the wiring from F/O MASTER CAUT light (11WW2) pin A/4 to the first terminal block ASM 315206.
   (2) If the lower section of the F/O MASTER CAUT light comes on:
     (a) If the fault continues:
  • do a check and repair the wiring from FWC1 (1WW1) pin AE/2A to the first terminal block ASM 315206.
Subtask 31-53-00-710-270-A
C. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:30:20 UTC
"WTRUIB" 2025