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 AMM 31-53-34-000-001 Removal of the Flight Warning Computer (FWC) (1WW1,1WW2) R AMM 31-53-34-400-001 Installation of the Flight Warning Computer (FWC) (1WW1,1WW2) ASM 31-51/01
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the central warning systems (FWC) (Ref. AMM TASK 31-50-00-710-001).
 4. Fault Isolation
_______________
 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:
 - replace the FWC-1 (1WW1), (Ref. AMM TASK 31-53-34-000-001) and (Ref. AMM TASK 31-53-34-400-001).
 (a) If the fault continues:
 - do a check of the wiring from the FWC 1 (1WW1) pin AC/1 to the circuit breaker (3WW) , (Ref. ASM 31-51/01).
 1 If there is no continuity:
_ - repair the wiring given above.

 2 If there is continuity:
_ - replace the C/B FWS/FWC1/SUPLY

 「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 ∞∞31-53-00∞∞∞∞∞∞∞∞∞∞Page 205
 Aug 01/02 CES

 (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).

 (b) If the circuit breaker stays closed and the fault continues:

 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).

 - replace the FWC-1 (1WW1).
 B. Do the test given in Para. 3.

 Loss of the ARINC 429 Output Bus from the FWC 1 to the FWC 2
 1. Possible Causes
_______________
 - FWC-1 (1WW1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-50-00-710-001 Ground Scanning of the Central Warning System AMM 31-53-34-000-001 Removal of the Flight Warning Computer (FWC) (1WW1,1WW2) R AMM 31-53-34-400-001 Installation of the Flight Warning Computer (FWC) (1WW1,1WW2) ASM 31-52/05
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the central warning systems (FWC) (Ref. AMM TASK 31-50-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message:
 NO DATA FROM OPPOSITE FWC

 - replace the FWC-1 (1WW1), (Ref. AMM TASK 31-53-34-000-001) and (Ref. AMM TASK 31-53-34-400-001).
 (1) If the fault continues:
 - do a check and repair the wiring from the FWC 1 (1WW1) pins AE/12B, 12C to the first terminal block , (Ref. ASM 31-52/05).
 B. Do the test given in Para. 3.

 No Link Between the FWC 1 and the FWC 2
 1. Possible Causes
_______________
 - FWC-2 (1WW2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-50-00-710-001 Ground Scanning of the Central Warning System AMM 31-53-34-000-001 Removal of the Flight Warning Computer (FWC) (1WW1,1WW2) R AMM 31-53-34-400-001 Installation of the Flight Warning Computer (FWC) (1WW1,1WW2) ASM 31-52/05
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the central warning systems (FWC) (Ref. AMM TASK 31-50-00-710-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message:
 NO DATA FROM OPPOSITE FWC

 - replace the FWC-2 (1WW2), (Ref. AMM TASK 31-53-34-000-001) and (Ref. AMM TASK 31-53-34-400-001).
　
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