Functional Test of the Three-Axis-Accelerometer

TASK 31-33-00-720-802-A
Functional Test of the Three-Axis-Accelerometer

FIN: 6TU

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	MULTIMETER - DIGITAL

B. Referenced Information

REFERENCE	DESIGNATION
TASK 08-21-00-200-001-A	Quick Leveling Using the Attitude Monitor
TASK 08-21-00-200-001-A-01	Quick Leveling with a Spirit Level in the FWD Cargo Compartment
TASK 08-21-00-200-001-A-02	Quick Leveling Procedure with the ADIRU
TASK 08-21-00-200-001-A-03	Quick Leveling with a Spirit Level in the Passenger Compartment
TASK 08-22-00-200-001-A	Precise Leveling
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-55-34-000-001-A	Removal of the SDAC
TASK 31-55-34-400-001-A	Installation of the SDAC

3. Job Set-up
Subtask 31-33-00-861-076-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Before you continue with this procedure make sure that the aircraft is levelled (Ref. AMM TASK 08-21-00-200-001) or (Ref. AMM TASK 08-22-00-200-001).

Subtask 31-33-00-020-059-A

B. Remove the SDAC 1 (1WV1) (Ref. AMM TASK 31-55-34-000-001).

Subtask 31-33-00-865-109-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	RCDR/ACCLRM	9TU	K18
** ON A/C NOT FOR ALL
121VU	RCDR/ACCLRM	9TU	K41

4. Procedure
Subtask 31-33-00-720-051-A

A. Do the functional test of the linear accelerometer.

ACTION	RESULT
1.At the SDAC 1 (1WV1) connector:	On the MULTIMETER - DIGITAL display:
measure the voltage between pin AB/11D and AB/11C.	make sure that the voltage is 2.335V +/-0.025V.
measure the voltage between pin AE/11F and AE/11E.	make sure that the voltage is 2.600V +/-0.025V.
measure the voltage between pin AE/11H and AE/11G.	make sure that the voltage is 2.600V +/-0.025V.
NOTE: If the voltage values are not correct, possibly the accelerometer is defective or not in horizontal position. To adjust the accelerometer in the correct position, washers can be removed or be added, but only if the aircraft is correcty levelled.

5. Close-up
Subtask 31-33-00-420-057-A

A. Install the SDAC 1 (1WV1) (Ref. AMM TASK 31-55-34-400-001).

Subtask 31-33-00-862-078-A

B. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:20:28 UTC