Removal of the Thermostat (22DV)

TASK 30-72-11-000-802-A
Removal of the Thermostat (22DV)

WARNING: ALWAYS USE RUBBER GLOVES WHEN YOU DO WORK:

ON THE WASTE WATER SYSTEM, OR
ON PARTS THAT HAVE CONTAMINATION FROM THE WASTE WATER SYSTEM.

WHEN YOU COMPLETE THE WORK PROCEDURE, CLEAN YOUR HANDS WITH SOAP AND WATER. THIS WILL PREVENT INFECTION (WASTE WATER IS DANGEROUS FOR HEALTH).

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	1	ACCESS PLATFORM 3M (10 FT)
No specific	AR	CAP - BLANKING
No specific	1	ELEC CONTACTS INSERTION EXTRACTION TOOL M15570-20
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
162DW, 172AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 52-30-00-860-006-A	Open the Bulk Cargo-Compartment Door
Thermostat (22DV)

3. Job Set-up
Subtask 30-72-11-861-053-A ** ON A/C NOT FOR ALL

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

Subtask 30-72-11-865-056-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	POT/WASTE WIP-SVCE-PNL	15DV	D01
** ON A/C NOT FOR ALL
2001VU	POT WIP-SVCE-PNL	15DV	D01

Subtask 30-72-11-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) in position at waste-water service panel 172AR.
(2) Open waste-water service panel 172AR and make sure that the drain-control handle is in the NORM position.
(3) Open the bulk cargo-compartment door (Ref. AMM TASK 52-30-00-860-006).
(4) Put an ACCESS PLATFORM 3M (10 FT) in position at the bulk cargo-compartment door.
(5) Set cargo-compartment light switch 18LU to the ON position.
(6) Remove partition 162DW to get access to the thermostat and terminal block 7585VT (Ref. AMM TASK 25-55-12-000-001).

4. Procedure
Subtask 30-72-11-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Thermostat
(1) Make match marks on the components that you disconnect/remove to record their connections/positions. This is important for the subsequent installation procedure.
(2) Remove and discard the TIE WRAP(S) from the electrical wires.

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.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(3) With the ELEC CONTACTS INSERTION EXTRACTION TOOL M15570-20, disconnect the electrical connections (4) from terminal block 7585VT.
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Remove the nuts (1), the washers (2), and the screws (7).
(6) Lift the thermostat housing cover (3).
(7) Loosen the threaded sleeve (9) with a screwdriver.
(8) Remove the threaded sleeve (9) and the washer (8).
(9) Remove the thermostat housing (5) from the locating stud (6).

[Rev.10 from 2021] 2026.04.01 00:32:18 UTC