Loss of the Signal of the Left Green Elevator-Servocontrol Servovalve by the SEC 2 (COM Part)

TASK 27-94-00-810-918-A
Loss of the Signal of the Left Green Elevator-Servocontrol Servovalve by the SEC 2 (COM Part)

1. Possible Causes

SEC-2 [1CE2]
wiring of the L ELEV SV (ANO 1) signal from the SEC 2 (1CE2) COM part to the MON part
wiring from the SEC 2 (1CE2) MON part, pins AD/1F, 1G to the first terminal block
wiring of the SV XDCR SPLY (34CE1) signal from the SEC 2 (1CE2) to the first terminal block
wiring of the POS XDCR (ANI 3-1) signal from the SEC 2 (1CE2) MON part to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279408
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 27-94-00-700-129-A

A. Test
(1) Do the operational test of the side stick assembly (activation for the BITE test) AMM 27-96-00-710-020.

NOTE: Before you start the operational test procedure, release the FLT CTL/ELAC 1 and FLT CTL/ELAC 2 pushbutton switches (on these pushbutton switches the OFF legends come on).

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

4. Fault Isolation
Subtask 27-94-00-810-163-A

A. If the test gives the maintenance message:
SEC2-COM OR WIRING TO L G ELEV SERVO VLV 34CE1

Replace the SEC-2 [1CE2] 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 L ELEV SV (ANO 1) signal from the SEC 2 (1CE2) COM part to the MON part, from pins AA/1A, 1B to pins AD/1J, 1K ASM 279408:

If there is continuity, go to Para. (b)
If there is no continuity, repair the above wiring.

(b) Do a check of the wiring from the SEC 2 (1CE2) MON part, pins AD/1F, 1G to the first terminal block ASM 279408:

If there is continuity, go to Para. (c)
If there is no continuity, repair the above wiring.

(c) Do a check of the wiring of the SV XDCR SPLY (34CE1) signal from the SEC 2 (1CE2) to the first terminal block ASM 279408:

If there is continuity go to Para. (d)
If there is no continuity repair the above wiring.

(d) Do a check and repair the wiring of the POS XDCR (ANI 3-1) signal from the SEC 2 (1CE2) MON part to the first terminal block ASM 279408:

Subtask 27-94-00-700-130-A

B. Do the tests given in Para. 3.

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