Loss of the Servo Motor 2 Signal on the THS Actuator for the ELAC 1

TASK 27-93-00-810-843-A
Loss of the Servo Motor 2 Signal on the THS Actuator for the ELAC 1

1. Possible Causes

ELAC-1 [2CE1]
wiring of the ANO 3 signal from the ELAC 1 (2CE1) to the ELAC 1 (2CE1)
wiring of the K12-1 and 2 signal from the ELAC 1 (2CE1) to the ELAC 1 (2CE1)
wiring of the K12-1B and 2B signals from the ELAC 1 (2CE1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279312
AMM 27-93-34-000-001	Removal of the ELAC
AMM 27-93-34-400-001	Installation of the ELAC
AMM 27-96-00-710-022	Operational Test of the THS Actuator Electrical Control (Activation for BITE Test)
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-93-00-700-098-A

A. Test
(1) Do the operational test of the THS actuator electrical control AMM 27-96-00-710-022.

NOTE: Do the ground setting only with the ELAC 1.

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

4. Fault Isolation
Subtask 27-93-00-810-092-A

A. If the BITE test gives the maintenance message:
ELAC1 OR WIRING TO THS ACTR SERVO MOT 2 9CE

(1) If the fault continues:

do a check of the wiring of the ANO 3 signal from the ELAC 1 (2CE1) to the ELAC 1 (2CE1), ASM 279312.

(a) If there is no continuity, repair the wiring.
(b) If there is continuity:

do a check of the wiring of the K12-1 and 2 signal from the ELAC 1 (2CE1) to the ELAC 1 (2CE1), ASM 279312.

1 If there is no continuity, repair the wiring.
2 If there is continuity:

do a check and repair the wiring of the K12-1B and 2B signals from the ELAC 1 (2CE1) to the first terminal block, ASM 279312.

Subtask 27-93-00-700-099-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:58 UTC