Loss of the Side Stick Priority Signal for One SEC

TASK 27-94-00-810-895-A
Loss of the Side Stick Priority Signal for One SEC

1. Possible Causes

SEC-1 [1CE1]
wiring
SEC-2 [1CE2]
SEC-3 [1CE3]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-32-00-810-932-A	Failure of the Discrete Links
ASM 279217
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-710-003	Operational Test of the Side Stick Priority
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-94-00-700-100-A

A. Test
(1) Do the operational test of the side stick priority AMM 27-96-00-710-003.
(2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-94-00-810-135-B

A. If the tests give the maintenance message CHECK PRIORITY WIRING:

do the trouble shooting (Ref. TSM TASK 31-32-00-810-932) related to the DSI 29/30 discret input signal of the SEC 1, SEC 2 and the SEC 3 ASM 279217.
do the tests given in Para. 3. with only the SEC1 engaged for the operational test of the side stick priority.

(1) If the tests give the above maintenance message again:

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

(a) If the fault continues:

do a check and repair the wiring of the STICK PRIORITY CAPT (DSI29) and STICK PRIORITY F/O (DSI30) signals from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279217.

(2) If the tests do not give a maintenance message:

do the tests given in Para. 3. with only the SEC2 engaged for the operational test of the side stick priority.

(a) If the tests give the maintenance message CHECK PRIORITY WIRING:

replace the SEC-2 [1CE2] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.

1 If the fault continues:

do a check and repair the wiring of the STICK PRIORITY CAPT (DSI29) and STICK PRIORITY F/O (DSI30) signals from the SEC2 (1CE2) COM part and MON part to the first terminal block ASM 279217.

(b) If the tests do not give a maintenance message:

replace the SEC-3 [1CE3] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.

1 If the fault continues:

do a check and repair the wiring of the STICK PRIORITY CAPT (DSI29) and STICK PRIORITY F/O (DSI30) signals from the SEC3 (1CE3) COM part and MON part to the first terminal block ASM 279217.

Subtask 27-94-00-700-101-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:20 UTC