Removal of the Oil Pressure Switch (APS 3200)

TASK 49-94-14-000-002-A
Removal of the Oil Pressure Switch (APS 3200)

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

FIN: 8091KM ** 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 4M (13 FT)-ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
315AL, 316AR

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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 52-41-00-010-001-A	Open the APU Doors for Access
Low Oil Pressure Switch
Oil Pressure Switch (8091KM)

3. Job Set-up
Subtask 49-94-14-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On overhead control and indicating panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).

Subtask 49-94-14-865-055-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
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-94-14-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below APU access doors 315AL and 316AR.
(2) Open APU access doors 315AL 316AR and (Ref. AMM TASK 52-41-00-010-001).
(3) Set LIGHT control switch 11LJ to the ON position.

4. Procedure
Subtask 49-94-14-020-051-B ** ON A/C NOT FOR ALL

A. Removal of the Oil Pressure Switch

Oil Pressure Switch (8091KM) ** ON A/C NOT FOR ALL

(1) Disconnect the electrical connector P14 (1) from the oil pressure switch (2).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Disconnect the tube (5) from the oil pressure switch (2).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Remove the bolts (3),(6) and the washers (7) and (8), release the bonding strap (4) and remove the oil pressure switch (2).

[Rev.10 from 2021] 2026.04.01 01:33:56 UTC