Removal of the Multipurpose Control & Display Unit (MCDU)

TASK 22-82-12-000-001-A
Removal of the Multipurpose Control & Display Unit (MCDU)

ZONE: 210
FIN: 3CA1
FIN: 3CA2
FIN: 3CA3 ** 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 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
MCDU ** ON A/C NOT FOR ALL
MCDU ** ON A/C NOT FOR ALL
MCDU ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 22-82-12-860-052-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 22-82-12-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/INSTL LT/MAIN INST/PNL AND/PED	4LF	Y04
** ON A/C NOT FOR ALL
FOR FIN: 3CA1 (MCDU1)
49VU	AUTO FLT/MCDU/1	11CA1	B01
** ON A/C NOT FOR ALL
49VU	AUTO FLT/MCDU/1	11CA1	H07
** ON A/C ALL
FOR FIN: 3CA2 (MCDU2)
121VU	AUTO FLT/MCDU/2	11CA2	N20

4. Procedure
Subtask 22-82-12-020-051-A

A. Removal of the MCDU

NOTE: This procedure is applicable to each MCDU.

(1) Loosen the Dzus fasteners (1).
(2) Pull the MCDU (2) from its housing.
(3) Before you disconnect the electrical connectors, make sure that there is identification on them. This is important for the subsequent installation procedure.
(4) Disconnect the electrical connector(s) (4).
(5) Remove the MCDU (2).
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.03.31 23:11:08 UTC