Removal of the System Controller

TASK 23-72-31-000-001-A
Removal of the System Controller

FIN: 9RA ** 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	1	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
811, 824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
System Controller

3. Job Set-up
Subtask 23-72-31-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 23-72-31-865-050-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	DOORS/CKPT/VIDEO/SPLY	15RA	T16

Subtask 23-72-31-010-050-A ** ON A/C NOT FOR ALL

C. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the access door 811 or 824.
(2) Open the access door 811 or 824 (Ref. AMM TASK 52-41-00-010-002).

4. Procedure
Subtask 23-72-31-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the System Controller

System Controller ** ON A/C NOT FOR ALL

(1) Loosen the nut (3) until you can release it from the catch (4).
(2) Pull the system controller (1) from its rack (2) to disconnect the electrical connectors at the rear.
(3) Remove the system controller (1) from the rack (2).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.02 06:12:20 UTC