OXY High Pressure Indication-Direct Reading

TASK 35-10-00-040-001-A
OXY High Pressure Indication-Direct Reading

1. Reason for the Job
MMEL 35-07-01A
CREW OXY HIGH PRESSURE INDICATION ON THE DOOR/OXY SD PAGE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	THERMOMETER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
812

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-14-35-600-001-A	Servicing of the Oxygen-Replenishing
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power

3. Job Set-up
Subtask 35-10-00-861-051-A

A. Energize the Ground Service Network (Ref. AMM TASK 24-42-00-861-001).

Subtask 35-10-00-010-053-A

B. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at access door 812.
(2) Open access door 812.

4. Procedure
Subtask 35-10-00-220-052-C ** ON A/C NOT FOR ALL

A. Check of the High Pressure of the Crew Oxygen-Storage Cylinder
(1) Do a check of the oxygen pressure on the direct-reading pressure gage of the crew oxygen-storage cylinder (5750HM).
(a) Record the oxygen pressure of the crew oxygen-storage cylinder (5750HM).
(2) Measure the Outside Air Temperature (OAT) and the temperature in the cockpit with a THERMOMETER.
(3) Calculate the reference temperature with this formula:

OAT + COCKPIT TEMPERATURE

-------------------------

(4) Record the reference temperature.
(5) Send the recorded values to the crew.
(6) After the crew uses the Flight Crew Operating Manual (FCOM), if the oxygen pressure recorded at Step 4.A.(1).(a) is less than the minimum oxygen pressure found in the FCOM table:

Fill the crew oxygen-storage cylinder (5750HM) (Ref. AMM TASK 12-14-35-600-001).

Subtask 35-10-00-220-052-E ** ON A/C NOT FOR ALL

A. Check of the High Pressure of the Crew Oxygen-Storage Cylinders
(1) Do a check of the oxygen pressure on the direct-reading pressure gage of the crew oxygen-storage cylinders 5750HM1 and 5750HM2.
(a) Record the oxygen pressure of the crew oxygen-storage cylinder 5750HM1 and record that this value is related to the Captain system.
(b) Record the oxygen pressure of the crew oxygen-storage cylinder 5750HM2 and record that this value is related to the First Officer system.
(2) Measure the Outside Air Temperature (OAT) and the temperature in the cockpit with a THERMOMETER.
(3) Calculate the reference temperature with this formula:

OAT + COCKPIT TEMPERATURE

-------------------------

(4) Record the reference temperature.
(5) Send the recorded values to the crew.
(6) After the crew uses the Flight Crew Operating Manual (FCOM), if the oxygen pressure(s) recorded at Step 4.A.(1) is (are) less than the minimum oxygen pressure(s) found in the FCOM table:

Fill the crew oxygen-storage cylinder(s) (5750HM1) and/or (5750HM2) (Ref. AMM TASK 12-14-35-600-001).

5. Close-up
Subtask 35-10-00-410-053-A

A. Close Access
(1) Close access door 812.
(2) Remove the access platform(s).
(3) Make an entry in the logbook.

Subtask 35-10-00-862-051-A

B. De-energize the Ground Service Network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 01:03:42 UTC