Failure of the SEC 3 Engagement

TASK 27-94-00-810-926-A
Failure of the SEC 3 Engagement

1. Possible Causes

SEC-3 [1CE3]
wiring of the SEC3 ENGAGED (DSI 04) signal
wiring from the pushbutton switch (5CE3)
P/BSW-FLT CTL/SEC 3 (5CE3)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279204
AIPC 27920802
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 27-94-00-740-183-A

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

4. Fault Isolation
Subtask 27-94-00-810-171-A

A. If the test confirms the fault:
(1) Replace the SEC-3 [1CE3] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.
(2) If the fault continues:
(a) Do a check and repair the wiring of the SEC3 ENGAGED (DSI 04) signal from the SEC3 (1CE3) COM part and MON part to the first terminal block ASM 279204.
(b) Do a check and repair the wiring from the pushbutton switch (5CE3), pin A/C1 and pin A/C3 to the first terminal block ASM 279204.
(3) If the fault continues:

Replace the P/BSW-FLT CTL/SEC 3 (5CE3) AIPC 27920802.

Subtask 27-94-00-740-184-A

B. Do the test given in Para.3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:28:22 UTC