Functional Check of ECAM Oxygen-Cylinder Contents Indication Compared with Cylinder Pressure Gauge

TASK 35-10-00-720-001-A
Functional Check of ECAM Oxygen-Cylinder Contents Indication Compared with Cylinder Pressure Gauge

ZONE: 123
ZONE: 125
ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 351000-08
FUNCTIONAL CHECK OF ECAM OXYGEN CYLINDER CONTENTS INDICATION COMPARED WITH CYLINDER PRESSURE GAUGE
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	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
123	NOSE GEAR WELL
125	LATERAL AVIONIC COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
812

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 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)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 35-00-00-860-001-A	Special Precautions When Working on a Gaseous 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

3. Job Set-up
Subtask 35-10-00-010-059-A ** ON A/C NOT FOR ALL

A. Get access to the avionics compartment.
(1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Put a WARNING NOTICE(S) in position to tell persons not to release the CREW SUPPLY pushbutton switch.
(3) Put an ACCESS PLATFORM 2M (6 FT) in position at access door 812.
(4) Open access door 812 (Ref. AMM TASK 52-41-00-010-002).
(5) Make sure that the valve of the oxygen storage cylinder (5750HM) is fully open.
(6) Put a WARNING NOTICE(S) in position to tell persons not to close the valve of oxygen storage cylinder 5750HM.

Subtask 35-10-00-010-059-B ** ON A/C NOT FOR ALL

A. Get access to the avionics compartment.
(1) Obey the special precautions when you do work on a gaseous oxygen system (Ref. AMM TASK 35-00-00-860-001).
(2) Put a WARNING NOTICE(S) in position to tell persons not to release the CREW SUPPLY pushbutton switch.
(3) Put an ACCESS PLATFORM 2M (6 FT) in position at access door 812.
(4) Open access door 812 (Ref. AMM TASK 52-41-00-010-002).
(5) Make sure that the two manual shutoff-valves of the crew oxygen-storage cylinders 5750HM1 and 5750HM2 are fully open.
(6) Put a WARNING NOTICE(S) in position to tell persons not to close the two manual shutoff-valves of the crew oxygen-storage cylinders 5750HM1 and 5750HM2.

Subtask 35-10-00-860-063-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 35-10-00-865-054-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

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

4. Procedure
Subtask 35-10-00-720-051-A ** ON A/C NOT FOR ALL

A. Test

ACTION	RESULT
1.On the ECAM control panel: Push the DOOR key.	On the lower ECAM display unit: The DOOR/OXY page comes into view.
2.On the lower ECAM display unit, on the DOOR/OXY page: Record the oxygen pressure value displayed near the OXY indication.
3.In the avionics compartment: Record the oxygen pressure value displayed on the direct-reading pressure gauge of the oxygen storage cylinder (5750HM).
4.Compare the oxygen pressure values recorded on the DOOR/OXY page and on the direct-reading pressure gauge.	Make sure that the oxygen pressure values are the same, approximately plus or minus 100 psi (6.89 bar).

Subtask 35-10-00-720-051-B ** ON A/C NOT FOR ALL

A. Test

ACTION	RESULT
1.On the ECAM control panel: Push the DOOR key.	On the lower ECAM DU: The DOOR/OXY page comes into view.
2.On the lower ECAM DU, on the DOOR/OXY page: Write the left-side oxygen-pressure value shown below the CKPT OXY indication. Write the right-side oxygen-pressure value shown below the CKPT OXY indication.
3.In the avionics compartment: Write the oxygen pressure value shown on the direct-reading pressure gauge of the crew oxygen-storage cylinder 5750HM1. Write the oxygen pressure value shown on the direct-reading pressure gauge of the crew oxygen-storage cylinder 5750HM2.
4.Compare the oxygen pressure values: Compare the left side oxygen-pressure below the CKPT OXY indication on the ECAM with the value of the direct-reading pressure gauge of the crew oxygen-storage cylinder 5750HM1. Compare the right side oxygen-pressure below the CKPT OXY indication on the ECAM with the value of the direct-reading pressure gauge of the crew oxygen-storage cylinder 5750HM2.	Make sure that the oxygen pressure values are the same, approximately plus or minus 100 psi (6.89 bar).

5. Close-up
Subtask 35-10-00-410-057-B

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) In the avionics compartment:

Remove the WARNING NOTICE(S).

(3) Close access door 812 (Ref. AMM TASK 52-41-00-410-002).
(4) Remove the access platform(s).

Subtask 35-10-00-860-064-B

B. Put the aircraft back to its initial configuration.
(1) In the cockpit:

Remove the WARNING NOTICE(S).

(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:03:51 UTC