Loss of the IR 1 Bus 2 for the SEC 2

TASK 27-94-00-810-849-A
Loss of the IR 1 Bus 2 for the SEC 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279254
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 27-94-00-740-090-A

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

4. Fault Isolation
Subtask 27-94-00-810-098-B

A. If the BITE test gives the maintenance message:
SEC2 OR BUS2 FROM IR1

(1) If the fault continues:

do a check and repair the wiring of the DGI-03 signal from the SEC 2 (1CE2) to the first terminal block, COM and MON parts ASM 279254.

Subtask 27-94-00-740-091-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:15 UTC