Removal of the MDDU

TASK 31-38-22-000-001-A
Removal of the MDDU

ZONE: 210
FIN: 1TD ** 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	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
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)
Multipurpose Disk Drive Unit (1TD)

3. Job Set-up
Subtask 31-38-22-862-050-A ** ON A/C NOT FOR ALL

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

Subtask 31-38-22-875-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	DATA/LOADER/SPLY	3TD	J16
121VU	DLS&/DLRB/SPLY	5TD	J15

4. Procedure
Subtask 31-38-22-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the MDDU
(1) Looseen the four quarter-turn fasterners (3).
(2) Pull the MDDU (1) from its housing.
(3) Disconnect the electrical connectors (2).
(4) Remove the MDDU (1).
(5) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.01 00:36:40 UTC