Installation of the Data Management Unit (DMU)

TASK 31-36-34-400-001-A
Installation of the Data Management Unit (DMU)

ZONE: 127
FIN: 1TV ** ON A/C NOT FOR ALL

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
824

C. 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 31-36-00-710-001-A	Test of the DMU
TASK 31-36-00-710-004-A	AIDS Software Load Procedure
TASK 31-36-00-710-008-A	AIDS Software Load Procedure through the PCMCIA-Card (PCMCIA = Personal Computer Memory Card International Association)
TASK 31-36-00-740-004-A	Update of the APU Hours and Cycles in the DMU after APU, ECB or DMU Replacement
TASK 31-36-00-740-005-A	Update of the Engine Hours and Cycles in the DMU after Engine or DMU Replacement
TASK 31-36-00-740-009-A	DMU Programming Procedures
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Data Management Unit (DMU)

3. Job Set-up
Subtask 31-36-34-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration

(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824 in zone 128.
(2) Make sure that the access door 824 is open.
(3) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)
(4) Energize the CFDS

Subtask 31-36-34-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS/DMU	4TV	K15

4. Procedure
Subtask 31-36-34-420-050-D ** ON A/C NOT FOR ALL

A. Installation of the Data Management Unit (DMU)
(1) Clean the component interfaces and the adjacent area.
(2) Make an inspection of the component interface and/or the adjacent area.
(3) Remove the blanking caps from the electrical connectors (2).
(4) Make sure that the electrical connectors (2) are clean and in the correct condition.
(5) Install the DMU (1) on its rack (3).
(6) Push the DMU (1) on its rack (3) to connect the electrical connectors (2).
(7) Engage the nuts (4) on the lugs (5) and tighten.
(8) Switch the operating/storage switch to the operating position.

Subtask 31-36-34-865-052-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AIDS/DMU	4TV	K15

Subtask 31-36-34-554-050-A ** ON A/C NOT FOR ALL

C. Do the AIDS Software Load Procedure (Ref. AMM TASK 31-36-00-710-004) (Ref. AMM TASK 31-36-00-710-008)

Subtask 31-36-34-554-052-A ** ON A/C NOT FOR ALL

D. Do the steps that follow:
(1) Do the updating of APU hours and cycles data (Ref. AMM TASK 31-36-00-740-004) and of Engine hours and cycles data (Ref. AMM TASK 31-36-00-740-005).
(2) Do the DMU programming procedures (Ref. AMM TASK 31-36-00-740-009).

NOTE: If the Programmable Report Inhibit and Programmable Report Limits procedures were done before with the GSE, it is not necessary to do them again.

Subtask 31-36-34-710-051-A ** ON A/C NOT FOR ALL

E. Do the operational test of the DMU (Ref. AMM TASK 31-36-00-710-001)

5. Close-up
Subtask 31-36-34-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824. (Ref. AMM TASK 52-41-00-410-002)
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 04:38:58 UTC