Removal of the Lavatory and Galley Extract Fan

TASK 21-23-51-000-001-A
Removal of the Lavatory and Galley Extract Fan

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

FIN: 1HU

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	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
162DW, 826

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 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
Lavatory and Galley Extract Fan

3. Job Set-up
Subtask 21-23-51-861-050-A

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

Subtask 21-23-51-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL	5HU	U21
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/SPLY	6HU	U19

Subtask 21-23-51-010-050-A

C. Get Access
(1) Open the AFT cargo-compartment door 826.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position at the AFT cargo-compartment door 826.
(3) Remove the access panel 162DW (Ref. AMM TASK 25-55-12-000-001).

4. Procedure
Subtask 21-23-51-020-050-B

A. Removal of the Lavatory and Galley Extract Fan
(1) Disconnect the electrical connector (5).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the nut (6), the washer (7), the bolt (10), the washer (9) and disconnect the bonding strap (8).
(4) Hold the outlet duct (12) and remove the clamp (1).
(5) Remove the outlet duct (12).
(6) Remove the clamp (4).
(7) Hold the lavatory and galley extract fan (3) and remove the clamp (2).
(8) Remove the lavatory and galley extract fan (3).
(9) Put blanking plugs on the open ends of the duct (11) and the lavatory and galley extract fan (3).

[Rev.10 from 2021] 2026.04.02 06:10:56 UTC