Loss of the Servo Motor 1 Signal on the THS Actuator for ELAC2

TASK 27-93-00-810-835-A
Loss of the Servo Motor 1 Signal on the THS Actuator for ELAC2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-44-57-000-001	Removal of the Pitch Trim Actuator from the THS Actuator
AMM 27-44-57-400-001	Installation of the Pitch Trim Actuator to the THS Actuator
ASM 279313
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 27-93-00-700-082-A

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

NOTE: It is necessary to do the ground setting only with ELAC2.

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

4. Fault Isolation
Subtask 27-93-00-810-084-A

A. If the BITE test gives the maintenance message:
ELAC 2 OR OUTPUT TO THS ACTR SERVO MOT 1 9CE

(1) If the fault continues:

(2) If the fault continues:

Do a check of the wiring of the ANO 3 signal from ELAC2 (2CE2) to ELAC2 (2CE2), ASM 279313.

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

Do a check and repair the wiring of the command signal from the THS actuator (9CE) to ELAC2 (2CE2), ASM 279313.

Subtask 27-93-00-700-083-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:57 UTC