Removal of the Pressure Switch

TASK 38-42-16-000-001-A
Removal of the Pressure Switch

FIN: 10MD ** 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)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
161DW, 162DW

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 38-10-00-614-002-A	Depressurization of the Potable Water System
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
Pressure Switch 10MD

3. Job Set-up
Subtask 38-42-16-861-051-A ** ON A/C NOT FOR ALL

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

Subtask 38-42-16-614-051-A ** ON A/C NOT FOR ALL

B. Depressurize the potable water system (Ref. AMM TASK 38-10-00-614-002)

Subtask 38-42-16-865-050-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
2001VU	WATER SYS-AIR-COMPRESSOR	19MD	F01

Subtask 38-42-16-941-051-A ** ON A/C NOT FOR ALL

D. Put the WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.

Subtask 38-42-16-010-050-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) below the AFT cargo-compartment door.
(2) Open the AFT cargo-compartment door (Ref. AMM TASK 52-30-00-860-001).
(3) Remove the access panels 161DW 162DW.

4. Procedure

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

Subtask 38-42-16-020-050-A ** ON A/C NOT FOR ALL

A. Removal of pressure Switch 10MD

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(1) Disconnect electrical connector (4) from the pressure switch (3).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove pressure switch (3) from the union (1).
(4) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.02 06:26:01 UTC