Failure of the THS Actuator Servo Motor 2

TASK 27-93-00-810-842-A
Failure of the THS Actuator Servo Motor 2

1. Possible Causes

pitch trim actuator
wiring of the command signal from the THS actuator (9CE) to the first terminal block

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 279312
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 27-93-00-700-096-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 27-93-00-810-091-A

A. If the BITE test gives the maintenance message:
THS ACTR SERVO MOT2 9CE

(1) If the fault continues:

do a check and repair the wiring of the command signal from the THS actuator (9CE) to the first terminal block, ASM 279312.

Subtask 27-93-00-700-097-A

B. Do the tests given in Para. 3.

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