Test of the DMU

TASK 31-36-00-710-001-A
Test of the DMU

ZONE: 120
ZONE: 210
FIN: 1TV ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
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)

3. Job Set-up
Subtask 31-36-00-861-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 31-36-00-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	B01
121VU	CFDS/CFDIU/SPLY	2TW	J18
121VU	CFDS/CFDIU/BACK/UP	8TW	J17
121VU	RCDR/ACCLRM	9TU	K18
121VU	AIDS/DMU	4TV	K15
121VU	AUTO FLT/MCDU/2	11CA2	N20

4. Procedure
Subtask 31-36-00-710-052-B ** ON A/C NOT FOR ALL

A. DMU Fault Monitoring Test

NOTE: If the PRINT> prompt shows on the MCDU display you can print the available information.

ACTION	RESULT
1.On the MCDU:	On the MCDU display:
Push the line key adjacent to <CFDS indication.	The CFDS page comes into view.
Push the line key adjacent to <SYSTEM REPORT/TEST indication.	The SYSTEM REPORT/TEST page comes into view.
Push the line key adjacent to INST> indication.	The SYSTEM REPORT/TEST - INST page comes into view.
Push the line key adjacent to DMU> indication.	The AIDS page comes into view.
Push the line key adjacent to <LRU IDENTIFICATION indication.	The AIDS LRU IDENTIFICATION page comes into view. The partnumber of the DMU, System Software and Setup Database shows.
Push the line key adjacent to RETURN indication.	The AIDS page comes into view.
Push the line key adjacent to GND SCANNING INDICATION.	The AIDS page comes into view.
Push line key adjacent to TEST> indication.	The AIDS TEST page comes into view.
Push the line key adjacent to <DMU POWER-UP TEST indication.	The message IN PROGRESS shows. After 4 seconds the message TEST OK shows. NOTE: If a failure is identified, the ATA reference, the failure message and the classification show.
Push the line key adjacent to <RETURN indication.	The AIDS TEST page comes into view.
Push the line key adjacent to <DMU BATTERY TEST indication.	The message IN PROGRESS shows. After 4 seconds the message BATTERY OK shows. NOTE: If a failure is identified, the ATA reference, the failure message and the classification show.
Push the line key adjacent to <RETURN indication.	The AIDS TEST page comes into view.
Push the MCDU MENU mode key.	The MCDU MENU page comes into view.

5. Close-up
Subtask 31-36-00-862-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 08:35:52 UTC