Removal of the CSAS Control Unit

TASK 21-58-34-000-001-A
Removal of the CSAS Control Unit

ZONE: 122
FIN: 100HW ** 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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
122	AVIONICS COMPARTMENT
811

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
Conditioned Service Air System (CSAS) Control Unit

3. Job Set-up
Subtask 21-58-34-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 21-58-34-865-050-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
122VU	CSAS / CTRL	1HW	U17

Subtask 21-58-34-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 811.
(2) Open the access door 811.

4. Procedure
Subtask 21-58-34-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the CSAS Control Unit (100HW)
(1) Loosen the knurled nut (1).
(2) Lower the knurled nut (1) to disengage the stud (2).
(3) Carefully pull the handle (3) until the CSAS Control Unit (4) is disconnected from the rack connector (5).
(4) Remove the CSAS Control Unit (4) from the rack (6).
(5) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.02 06:11:34 UTC