Removal of the CSM/G Control Unit

TASK 24-24-34-000-001-A
Removal of the CSM/G Control Unit

ZONE: 125
FIN: 1XE

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
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
125	LATERAL AVIONIC COMPARTMENT
812, 822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
CSM/G Control Unit

3. Job Set-up
Subtask 24-24-34-860-050-A

A. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) In the cockpit, on the EMER ELEC PWR section of the overhead panel 21VU, put a WARNING NOTICE(S) to tell persons not to operate the pushbutton switches.

Subtask 24-24-34-010-050-A

B. Get access to the avionics compartment.
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the access doors 812 and 822 of the avionics compartment.
(2) Open the access doors 812 and 822.

Subtask 24-24-34-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/CSM/G /EV AUTO/SPLY	7XE	C01
106VU	CSM/G /EV/MAN/SPLY	6XE	B04

4. Procedure
Subtask 24-24-34-020-050-A

A. Removal of the GCU
(1) Disconnect the electrical connector (4).
(2) Loosen the 4 screws (3).
(3) Hold the CSM/G control unit (1).
(4) Remove the screws (3) and the washers (2).
(5) Remove the CSM/G control unit (1).
(6) Put CAP - BLANKING on the electrical connector (4) and the electrical receptacle (5).

[Rev.10 from 2021] 2026.03.31 23:22:38 UTC