Removal of the Landing Elevation Selector

TASK 21-31-15-000-801-A
Removal of the Landing Elevation Selector

ZONE: 210
FIN: 20HL

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
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
Landing Elevation Selector

3. Job Set-up
Subtask 21-31-15-862-050-A

A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 21-31-15-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	LIGHTING/INSTL LT/OVHD/PNL	3LF	Y03

Subtask 21-31-15-941-050-A

C. Safety Precautions
(1) Make sure that all the systems of the CABIN PRESS control panel 25VU do not operate.

4. Procedure
Subtask 21-31-15-020-050-A

A. Removal of the Landing Elevation Selector
(1) Loosen the four quarter-turn fasteners (7).
(2) Pull the air conditioning panel 25VU (6) from its housing. Do not disconnect the electrical connectors (1), (2), (3), (4) and (5) from the rear plate.
(3) Disconnect the electrical connector (8).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(5) Loosen the two screws (15).
(6) Pull the knob (14) from its shaft.
(7) Removal of the integrally-lighted identification Plate (11LF).
(a) Remove the five screws (17).
(b) Remove the integrally-lighted identification plate (16).
(8) Remove the nut (13) and the washer (12).
(9) Remove the selector (9).

[Rev.10 from 2021] 2026.04.02 06:11:14 UTC