Removal of the Oxygen Filling Indicator

TASK 35-13-21-000-001-A
Removal of the Oxygen Filling Indicator

WARNING: KEEP ALL HYDROCARBONS (FUELS, LUBRICANTS, ETC.) AWAY FROM ALL SOURCE OF OXYGEN. OXYGEN BECOMES EXPLOSIVE WHEN IT TOUCHES HYDROCARBONS.

WARNING: CLEAN THE TOOLS AND MAKE SURE YOUR HANDS ARE CLEAN TO PREVENT CONTAMINATION OF THE OXYGEN SYSTEM.

ZONE: 123
ZONE: 125
FIN: 5HT ** ON A/C NOT FOR ALL
FIN: 5HT1 ** ON A/C NOT FOR ALL
FIN: 5HT2 ** 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	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	BAG - VINYL, SEALED
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL
125	LATERAL AVIONIC COMPARTMENT
812

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 35-00-00-860-001-A	Special Precautions When Working on a Gaseous Oxygen System
Oxygen Filling Indicator ** ON A/C NOT FOR ALL
Oxygen Filling Indicator ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 35-13-21-010-050-A

A. Get Access
(1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) in position below access door 812.
(3) Open access door 812.

Subtask 35-13-21-860-050-A

B. Aircraft Maintenance Configuration
(1) Energize the ground service network (Ref. AMM TASK 24-42-00-861-001).
(2) In the cockpit, on the OXYGEN section of the overhead control and indicating panel 21VU:

Make sure that the CREW SUPPLY pushbutton switch is released (the OFF legend is on).
Put a WARNING NOTICE(S) in position to tell persons not to push the CREW SUPPLY pushbutton switch.

Subtask 35-13-21-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

4. Procedure
Subtask 35-13-21-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Oxygen Filling Indicator.
(1) Disconnect the electrical connector (4) from the indicator (1).
(2) Put a CAP - BLANKING on the disconnected electrical connector (4).
(3) Loosen the adjusting screw (2) of the clamp (3).
(4) Remove the indicator (1) from the clamp (3).

Subtask 35-13-21-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Oxygen Filling Indicator

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 the electrical connector (1) from the oxygen filling indicator (4).
(2) Put a CAP - BLANKING on the disconnected electrical connector (1).
(3) Loosen the adjusting screws (3) of the clamp (2).
(4) Remove the oxygen filling indicator (4) from the clamp (2) and from the support plate (5).
(5) Put the oxygen filling indicator (4) in a BAG - VINYL, SEALED.

[Rev.10 from 2021] 2026.04.01 01:04:36 UTC