Loss of the IR 2 Bus 2 for the SEC 3

TASK 27-94-00-810-851-A
Loss of the IR 2 Bus 2 for the SEC 3

1. Possible Causes

SEC-3 [1CE3]
wiring of the DGI-03 signal from the SEC 3 (1CE3) COM part to the second terminal block
wiring of the DGI-03 signal from the SEC 3 (1CE3) to the first terminal block

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 27-94-00-740-094-A

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

4. Fault Isolation
Subtask 27-94-00-810-100-B

A. If the BITE test gives the maintenance message:
SEC3 OR BUS2 FROM IR2

(1) If the fault continues:

do a check and repair the wiring of the DGI-03 signal from the SEC 3 (1CE3) COM part to the second terminal block (1840VT) ASM 279255.
do a check and repair the wiring of the DGI-03 signal from the SEC 3 (1CE3) to the first terminal block, COM and MON parts ASM 279255.

Subtask 27-94-00-740-095-A

B. Do the test given in Para. 3.

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