Loss of the BUS 3 Signal for the SEC 3

TASK 27-94-00-810-874-A
Loss of the BUS 3 Signal for the SEC 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279255
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-94-00-740-116-A

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

4. Fault Isolation
Subtask 27-94-00-810-111-A

A. If the BITE test gives the maintenance message:
SEC3 MON BUS3
or
SEC3 COM BUS3

(1) If the fault continues:

do a check and repair the wiring of the DGO3 signal from the SEC 3 (1CE3) MON part to the COM part if the maintenance message is SEC 3 MON BUS 3 ASM 279255
or
do a check an repair the wiring of the DG03 signal from the SEC 3 (1CE3) COM part to the MON part if the maintenance message is SEC 3 COM BUS 3 ASM 279255.

Subtask 27-94-00-740-117-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:18 UTC