Failure of the FWC 1 Pin Programming

TASK 31-53-00-810-816-A
Failure of the FWC 1 Pin Programming

1. Possible Causes

FWC-1 [1WW1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
AMM 31-50-00-740-002	Read and Decode the Hardware Pin Programming of the SDAC and FWC
AWM 315227
AWM 315234
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 31-53-00-710-066-A

A. Test
Do the operational test of the central warning systems (FWC) AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 31-53-00-810-065-A

A. If the test gives the maintenance message:
FWC 1 : PIN PROGRAM FAIL
(1) Read the pin programming related to the FWC 1 AMM 31-50-00-740-002.
(2) Compare the pin programming related to the FWC 1 with the state of the aircraft pin programming given in the ASM AWM 315227, AWM 315234.
(a) If the pin programming is incorrect:

repair the aircraft wiring.

(b) If the pin programming is correct:

replace the FWC-1 [1WW1] , AMM 31-53-34-000-001 and AMM 31-53-34-400-001.

Subtask 31-53-00-710-067-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:12 UTC