Loss of the FCDC2 Fail Discrete Signal for the FCDC1

TASK 27-95-00-810-801-A
Loss of the FCDC2 Fail Discrete Signal for the FCDC1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279504
AMM 27-95-34-000-001	Removal of the FCDC
AMM 27-95-34-400-001	Installation of the FCDC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-95-00-740-110-A

A. Test
(1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-95-00-810-081-A

A. If the BITE test gives the maintenance message OPP FCDC FAIL DISCR:

do a check of the wiring of the OPP FCDC FAILED (DSI 17/5) signal from the FCDC2 (3CE2) to the FCDC1 (3CE1) ASM 279504.

(1) If the fault continues:

(2) If the fault continues:

Subtask 27-95-00-740-111-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:23 UTC