Loss of the Pitch Signal on the F/O Side Stick for the SEC 2 (New-Generation Side-Stick Unit)

TASK 27-94-00-810-913-A
Loss of the Pitch Signal on the F/O Side Stick for the SEC 2 (New-Generation Side-Stick Unit)

1. Possible Causes

SSU-F/O [100CE2]
SEC-2 [1CE2]
wiring from the SEC 2 (1CE2) to the SSU (100CE2)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279215
AMM 27-92-41-000-802	Removal of the New-Generation Side-Stick Unit
AMM 27-92-41-400-802	Installation of the New-Generation Side-Stick Unit
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-710-020	Operational Test of the Side Stick Assembly (Activation for the BITE Test)
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-94-00-700-119-A

A. Test
(1) Do the operational test of the side-stick unit (activation for the BITE test) AMM 27-96-00-710-020.
(2) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-94-00-810-158-A

A. If the BITE test gives the maintenance message:
SEC2 OR INPUT OF F/O PITCH CTL SSTU 4CE4

replace the SSU-F/O [100CE2] , AMM 27-92-41-000-802 and AMM 27-92-41-400-802.

(1) If the fault continues:

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

(2) If the fault continues:

do a check and repair the wiring from the SEC 2 (1CE2) to the SSU (100CE2), ASM 279215.

Subtask 27-94-00-700-120-A

B. Do the operational test and the BITE test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:21 UTC