Failure of the FWC 2 Pin Programming

TASK 31-53-00-810-817-A
Failure of the FWC 2 Pin Programming

1. Possible Causes

FWC-2 [1WW2]

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 315228
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 31-53-00-710-068-A

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

4. Fault Isolation
Subtask 31-53-00-810-066-A

A. If the test gives the maintenance message:
FWC 2 : PIN PROGRAM FAIL
(1) Read the pin programming related to the FWC 2 AMM 31-50-00-740-002.
(2) Compare the pin programming related to the FWC 2 with the state of the aircraft pin programming given in the ASM AWM 315228, AWM 315234.
(a) If the pin programming is incorrect:

reapir the aircraft wiring.

(b) If the pin programming is correct:

replace the FWC-2 [1WW2] , AMM 31-53-34-000-001 and AMM 31-53-34-400-001.

Subtask 31-53-00-710-069-A

B. Do the test given in Para. 3.

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