Installation of the LP Oxygen-Supply Solenoid-Valve

TASK 35-13-51-400-001-A
Installation of the LP Oxygen-Supply Solenoid-Valve

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

NOTE: After the installation of the LP oxygen-supply solenoid-valve, refer to SB 35-1096 and EASA AD 2020-0104 for the requirement of the flow test.

ZONE: 125
FIN: 3HT ** 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	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 20.3 and 14.7 m.N (14.97 and 10.84 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GEE1)	Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated -
(Material No.14CCB6)	Testing Medium-Leak Detection - Oxygen System

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
125	LATERAL AVIONIC COMPARTMENT

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	BUSH	AIPC 35-12-01-01-010
7	RING	AIPC 35-12-01-01-010

E. 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 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)
LP Oxygen-Supply Solenoid-Valve

3. Job Set-up
Subtask 35-13-51-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the access door 812.
(2) Make sure that the access door 812 is open.
(3) Make sure that the electrical circuit is energized (Ref. AMM TASK 24-41-00-861-002).
(4) Make sure that the WARNING NOTICE(S) which tells persons not to open the valve of the oxygen cylinder is in position.
(5) Make sure that the WARNING NOTICE(S) which tells persons not to push the OXYGEN/CREW SUPPLY pushbutton switch is in position.

Subtask 35-13-51-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

4. Procedure
Subtask 35-13-51-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the LP Oxygen-Supply Solenoid-Valve
(1) Apply a thin layer of Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated - (Material No.03GEE1) to the first three male threads of the nut or the flared tube.
(2) Put the LP oxygen-supply solenoid-valve (6) on its support (1) and attach it with the screws (2) and the washers (3).
(3) Remove the PLUG - BLANKING from the pipe (8).
(4) Install the new AIPC 35-12-01-01-010 RING (7) on the pipe (8).
(5) Install the pipe (8) on the solenoid valve (6).
(6) TORQUE the coupling nut of the pipe (8) to between 20.3 and 14.7 m.N (14.97 and 10.84 lbf.ft )

.
(7) Remove the PLUG - BLANKING from the pipe (5).
(8) Install the new AIPC 35-12-01-01-010 BUSH (4) on the pipe (5).
(9) Install the pipe (5) on the solenoid valve (6).
(10) TORQUE the coupling nut of the pipe (5) to between 20.3 and 14.7 m.N (14.97 and 10.84 lbf.ft )

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.

(11) Connect the electrical connector (9) to the solenoid valve (6).

Subtask 35-13-51-865-053-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	OXYGEN/CREW/OXY/SPLY	1HT	HA01

Subtask 35-13-51-790-051-B ** ON A/C NOT FOR ALL

C. Test of the Solenoid Valve
(1) On the ECAM select DOOR/OXY page.
The OXY LO PR legend comes amber.
(2) On the panel 21VU, push the OXYGEN/CREW SUPPLY pushbutton switch, the OFF legend goes off.
On ECAM no change.
(3) Apply the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the mechanical connections.
(4) Very slowly open the valve of the cylinder (5750HM) 3.5 to 4 turns.
(5) Let the pressure become stable. This occurs after approximately 90 seconds.
(6) Fully open the cylinder valve.

On ECAM the OXY LO PR legend goes off.

(7) Examine each connection to make sure that there are no leaks.
(8) Rub off the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) .
(9) On the C/B panel 49VU open the circuit breaker 1HT:

On ECAM the OXY LO PR legend remains off.

(10) On the C/B panel 49VU close the circuit breaker 1HT:

On ECAM no change.

(11) On the panel 21VU, release the OXYGEN/CREW SUPPLY pushbutton switch. The OFF legend comes on.
(12) On the oxygen-mask stowage box, operate the PRESS TO TEST AND RESET control slide a sufficient number of times to make the system empty.
(13) On the DOOR page of the lower display unit of the ECAM system, the OXY LO PR legend comes on amber.

NOTE: The OXY LO PR legend goes off when the LP oxygen-supply solenoid-valve (3HT) is open.

Subtask 35-13-51-790-051-D ** ON A/C NOT FOR ALL

C. Test of the Solenoid Valve
(1) On the ECAM select DOOR/OXY page.
The OXY LO PR legend comes amber.
(2) On the panel 21VU, push the OXYGEN/CREW SUPPLY pushbutton switch, the OFF legend goes off.
On ECAM no change.
(3) Apply the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the mechanical connections.
(4) Turn the valve of the cylinder (5750 HM) very slowly until it is fully open.

On ECAM the OXY LO PR legend goes off.

(5) Examine each connection to make sure that there are no leaks.
(6) Rub off the solution Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) .
(7) On the C/B panel 49VU open the circuit breaker 1HT:

On ECAM the OXY LO PR legend remains off.

(8) On the C/B panel 49VU close the circuit breaker 1HT:

On ECAM no change.

(9) On the panel 21VU, release the OXYGEN/CREW SUPPLY pushbutton switch. The OFF legend comes on.
(10) On the oxygen-mask stowage box, operate the PRESS TO TEST AND RESET control slide a sufficient number of times to make the system empty.
(11) On the DOOR page of the lower display unit of the ECAM system, the OXY LO PR legend comes on amber.

NOTE: The OXY LO PR legend goes off when the LP oxygen-supply solenoid-valve (3HT) is open.

5. Close-up
Subtask 35-13-51-860-051-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the WARNING NOTICE(S).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 35-13-51-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the access door 812.
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 01:04:45 UTC