Removal of the Audio Mixing Box

TASK 31-53-33-000-001-A
Removal of the Audio Mixing Box

ZONE: 120
FIN: 15WW ** 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 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
120	AVIONICS COMPARTMENT
811

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Audio Mixing Box (15WW)

3. Job Set-up
Subtask 31-53-33-861-050-A ** ON A/C NOT FOR ALL

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

Subtask 31-53-33-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the access door 811 of the avionics compartment.
(2) Open the access door 811 (Ref. AMM TASK 52-41-00-410-002).

Subtask 31-53-33-875-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	AUDIO MIXING	14WW	K03

4. Procedure
Subtask 31-53-33-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Audio Mixing Box
(1) Disconnect the electrical connector (1) from the audio mixing box (2).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the four screws (3) and the the washers (4).
(4) Remove the audio mixing box (2).

[Rev.10 from 2021] 2026.04.01 00:37:25 UTC