Removal of the Preselection Control Unit

TASK 38-13-34-000-001-A
Removal of the Preselection Control Unit

FIN: 7MA ** 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
162CW

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Preselection Control Unit 7MA

3. Job Set-up
Subtask 38-13-34-861-050-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 38-13-34-865-053-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
2001VU	WATER SYS-QUANT-IND	1MA	B06

Subtask 38-13-34-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the AFT cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(2) Remove the access panel 162CW.

4. Procedure
Subtask 38-13-34-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Preselection Control Unit
(1) Disconnect the electrical connector (4) 7MA-A.
(2) Remove the screws (2) the washers (3) and remove the preselection control unit (1) 7MA.
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

[Rev.10 from 2021] 2026.04.02 06:25:42 UTC