Failure of the Three Axis Accelerometer

TASK 31-54-00-810-894-A
Failure of the Three Axis Accelerometer

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-33-16-000-001	Removal of the Three-Axis-Accelerometer (LA)
AMM 31-33-16-400-001	Installation of the Three-Axis-Accelerometer (LA)
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
ASM 315402

3. Fault Confirmation
Subtask 31-54-00-865-122-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	RCDR/ACCLRM	9TU	K18

Subtask 31-54-00-710-224-A

B. Test
Do the ground scanning of the central warning systems AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 31-54-00-810-143-A

A. If the test gives the maintenance message SDAC1 : ACCELEROMETER 6TU:

replace the ACCELEROMETER-THREE AXIS [6TU] , AMM 31-33-16-000-001 and AMM 31-33-16-400-001.

(1) If the fault continues:

do a check of the wiring from accelerometer (6TU) pins A/C, D to the first terminal block

(a) If there is no continuity:

(b) If there is continuity:

do a check of the wiring from accelerometer (6TU) pins A/E, F to the first terminal block

1 If there is no continuity:

2 If there is continuity:

do a check and repair the wiring from accelerometer (6TU) pins A/G, H to the first terminal block ASM 315402.

Subtask 31-54-00-710-225-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:29 UTC