Loss of the SFCC 1 Signal for the SEC 1

TASK 27-94-00-810-856-A
Loss of the SFCC 1 Signal for the SEC 1

1. Possible Causes

SEC-1 [1CE1]
wiring of the DGI 12 signal from the SEC 1 (1CE1) to the first terminal block
wiring of the SLATS OUT (DSI 20) signal from the SEC 1 (1CE1) COM part to the SFCC 1 (21CV)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-32-00-810-932-A	Failure of the Discrete Links
AMM 27-80-00-866-004	Extending the Slats on the Ground
ASM 278110
ASM 279242
ASM 279253
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 27-94-00-740-104-A

A. Test
(1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001 with the slat extended in position 1 AMM 27-80-00-866-004.

4. Fault Isolation
Subtask 27-94-00-810-105-B

A. If the BITE test gives the maintenance message:
SEC1 OR WIRING FROM SFCC1

replace the SEC-1 [1CE1] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.

(1) If the fault continues:
(a) Do a check of the wiring of the DGI 12 signal from the SEC 1 (1CE1) to the first terminal block, COM part only ASM 279253:

if there is continuity, see Para. (b)
if there is no continuity, repair the above wiring.

(b) Do a check and repair the wiring of the SLATS OUT (DSI 20) signal from the SEC 1 (1CE1) COM part to the SFCC 1 (21CV), ASM 279242.
(2) If the fault continues, do the trouble shooting procedure (Ref. TSM TASK 31-32-00-810-932) related to the dicrete output signal (SAP #3, pin AE/8F) of the SFCC1 (21CV) ASM 278110.

Subtask 27-94-00-740-105-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:16 UTC