W DOC AIRBUS | TSM A320F

Failure of the FWC 1

TASK 31-53-00-810-804-A
Failure of the FWC 1

1. Possible Causes
  • FWC-1 [1WW1]
  • wiring
  • C/B FWS/FWC1/SUPLY
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-50-00-710-001
Ground Scanning of the Central Warning System
ASM 315101
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)
3. Fault Confirmation
Subtask 31-53-00-710-056-A
A. Test
Do the operational test of the central warning systems (FWC) AMM 31-50-00-710-001.
4. Fault Isolation
Subtask 31-53-00-810-053-A
A. If the test gives the maintenance message:
FWC1
  • do a check of the status of the circuit breaker (3WW).
   (1) If the circuit breaker (3WW) is closed:
     (a) If the fault continues:
  • do a check of the wiring from the FWC 1 (1WW1) pin AC/1 to the circuit breaker (3WW) , ASM 315101.
       1 If there is no continuity:
  • repair the wiring given above.
       2 If there is continuity:
  • replace the C/B FWS/FWC1/SUPLY
   (2) If the circuit breaker (3WW) is open:
  • close the circuit breaker.
     (a) If the circuit breaker is open again:
  • replace the FWC-1 [1WW1] .
       1 If the fault continues:
  • do a check and repair for a short to ground the wiring between the circuit breaker (3WW) and the FWC 1 (1WW1).
     (b) If the circuit breaker stays closed and the fault continues:
  • replace the FWC-1 [1WW1] .
Subtask 31-53-00-710-057-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:30:11 UTC
"WTRUIB" 2025