DOC AIRBUS | AMM A320FRemoval of the Data Management Unit (DMU)
TASK 31-36-34-000-001-A
Removal of the Data Management Unit (DMU)
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 31-36-34-740-052-A ** ON A/C NOT FOR ALL
Subtask 31-36-34-550-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 04:37:29 UTC
Removal of the Data Management Unit (DMU)
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 |
| No specific | AR | CAP - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 127 | REAR AVIONIC COMPARTMENT |
| 824 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 31-36-00-740-006-A | Printout of the APU Hours and Cycles |
| TASK 31-36-00-740-007-A | Printout of the Engine Hours and Cycles |
Data Management Unit (DMU)Subtask 31-36-34-740-052-A ** ON A/C NOT FOR ALL
A. Print out the APU hours and cycles (Ref. AMM TASK 31-36-00-740-006) and the Engine hours and cycles (Ref. AMM TASK 31-36-00-740-007)
Subtask 31-36-34-865-050-A ** ON A/C NOT FOR ALL B. Open, safety and tag this(these) circuit breaker(s):
Subtask 31-36-34-010-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | AIDS/DMU | 4TV | K15 |
C. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position in zone 128, at the access door 824.
(2) Open the access door 824.
4. Procedure(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position in zone 128, at the access door 824.
(2) Open the access door 824.
Subtask 31-36-34-550-053-A ** ON A/C NOT FOR ALL
A. On the DMU front face, set the OPERATING/STORAGE switch to STORAGE.
Subtask 31-36-34-550-053-B ** ON A/C NOT FOR ALL A. On the DMU front face, set the ON/OFF switch to OFF.
(1) To do so open the left door, the one bearing the caution: "BEFORE INSTALLING SET INSIDE SWITCH TO ON". Push down the small handle and the door swivels open to show a hole in the upper part with a switch. Use one finger to set the switch to OFF.
(2) Swivel back the door to its closed position.
Subtask 31-36-34-020-050-A ** ON A/C NOT FOR ALL (1) To do so open the left door, the one bearing the caution: "BEFORE INSTALLING SET INSIDE SWITCH TO ON". Push down the small handle and the door swivels open to show a hole in the upper part with a switch. Use one finger to set the switch to OFF.
(2) Swivel back the door to its closed position.
B. Removal of the Data Management Unit (DMU)
(1) Loosen the nuts (4) on the front of the rack (3).
(2) Lower the nuts (4).
(3) Pull the DMU (1) on its rack (3) to disconnect the electrical connectors (2).
(4) Remove the DMU (1) from its rack (3).
(5) Put CAP - BLANKING on the disconnected electrical connectors (2).
(1) Loosen the nuts (4) on the front of the rack (3).
(2) Lower the nuts (4).
(3) Pull the DMU (1) on its rack (3) to disconnect the electrical connectors (2).
(4) Remove the DMU (1) from its rack (3).
(5) Put CAP - BLANKING on the disconnected electrical connectors (2).