Loss of the Left Green Elevator-Servocontrol Mode-Transducer by the SEC 1

TASK 27-30-00-810-821-A
Loss of the Left Green Elevator-Servocontrol Mode-Transducer by the SEC 1

1. Possible Causes

SEC-1 [1CE1]
wiring of the L G SERVO CTL MODE POS (ANI 7-1) from SEC 1 (1CE1) MON part to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-90-00-810-818-A	Loss of the ACS1 Signal of the SEC1 MON Side
ASM 279407
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 27-30-00-700-082-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, FLT CTL/ELAC 2 and FLT CTL/SEC 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.
(a) If the ground scanning gives the maintenance message:
SEC1 OR WIRING FROM L G ELEV MODE XDCR 34CE1

refer to Para. Fault Isolation.

(b) If the ground scanning gives at least two maintenance messages of the list below:
SEC1 OR WIRING FROM L ELEV POS MON XDCR
SEC1 OR WIRING FROM R ELEV POS MON XDCR
SEC1 MON OR WIRING FROM THS ACTR XDCR2 9CE
SEC1 OR WIRING FROM L G ELEV MODE XDCR 34CE1
SEC1 OR WIRING FROM R Y ELEV MODE XDCR 34CE2

do this trouble shooting procedure (Ref. TSM TASK 27-90-00-810-818).

4. Fault Isolation
Subtask 27-30-00-810-066-A

A. If the test gives the maintenance message:
SEC1 OR WIRING FROM L G ELEV MODE XDCR 34CE1

Replace the SEC-1 [1CE1] 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 L G SERVO CTL MODE POS (ANI 7-1) from SEC 1 (1CE1) MON part to the first terminal block ASM 279407.

Subtask 27-30-00-700-083-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:32 UTC