Installation of the Altitude Switch

TASK 35-23-15-400-001-A
Installation of the Altitude Switch

ZONE: 211
FIN: 16WR

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	ACCESS PLATFORM 2M (6 FT)
No specific	AR	CAP - BLANKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 35-23-00-720-002-A	Functional Test of the Passenger Emergency-Oxygen System
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Altitude Switch

3. Job Set-up
Subtask 35-23-15-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the access door 824.
(2) Make sure that the access door 824 is open (Ref. AMM TASK 52-41-00-010-002).

Subtask 35-23-15-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	OXYGEN/PASSENGER/CTL AND WARN	1WR	HA02

4. Procedure
Subtask 35-23-15-420-050-A

A. Install the Altitude Switch
(1) Install the altitude switch (2) on its support (3) and install and tighten the screws (4) and the washers (5).
(2) Remove the CAP - BLANKING from the electrical connector (1).
(3) Connect the electrical connector (1) to the altitude switch (2).
(4) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
1WR

Subtask 35-23-15-720-051-A

B. Functional test
(1) Do the functional test of the passenger oxygen system (Ref. AMM TASK 35-23-00-720-002).

5. Close-up
Subtask 35-23-15-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:05:18 UTC