Loss of the Signal of the Left Blue Elevator-Servocontrol Position-Transducer by the SEC 1

TASK 27-30-00-810-802-A
Loss of the Signal of the Left Blue Elevator-Servocontrol Position-Transducer by the SEC 1

1. Possible Causes

SEC-1 [1CE1]
wiring of the POS XDCR COM (ANI 2-1) signal from the SEC 1 (1CE1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-90-00-810-817-A	Loss of the ACS1 Signal of the SEC1 COM 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 27-30-00-700-052-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 pushbutton switch (on this pushbutton switch the OFF legend comes 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 B ELEV POS XDCR 34CE3

refer to Para. Fault Isolation.

(b) If the ground scanning gives at least two maintenance messages of the list below:
SEC1 COM OR WIRING FROM THS ACTR XDCR2 9CE
SEC1 OR WIRING FROM L B ELEV POS XDCR 34CE3
SEC1 OR WIRING FROM R B ELEV POS XDCR 34CE4

do this trouble shooting procedure (Ref. TSM TASK 27-90-00-810-817).

4. Fault Isolation
Subtask 27-30-00-810-051-A

A. If the test gives the maintenance message:
SEC1 OR WIRING FROM L B ELEV POS XDCR 34CE3

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 POS XDCR COM (ANI 2-1) signal from the SEC 1 (1CE1) to the first terminal block ASM 279407.

Subtask 27-30-00-700-053-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:30 UTC