4. Procedure
_________ (Ref. Fig. 504/TASK 35-10-00-991-005) Subtask 35-10-00-790-051
A. Supply the oxygen system with the tool cylinder in the normal condition (open the valve of the tool cylinder).
(1) On all the oxygen mask stowage boxes:
- operate the PRESS TO TEST AND RESET control slide a sufficient number of times (to fill the oxygen system with the gaseous mixture).
Subtask 35-10-00-790-052
B. Test
(1)
Calibrate the HELITEST tool in PPM.
(2)
Do a check for leaks with the leak detector.
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35-10-00Page 517
Flight Crew Oxygen System - Schematic
Figure 504/TASK 35-10-00-991-005
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Feb 01/98
CES
(3) Measure the values and compare with the table below:
-maximum leak values permitted for equipment and items of the cockpit oxygen system.
-------------------------------------------------------------------------------| | Maximum Leak permitted | | EQUIPMENT | with a Mixture of 10% | | | Helium "PPM" | -------------------------------------------------------------------------------| Coupling | 50 | | Low Pressure Solenoid Valve | 300 | | Pressure Regulator/ Transmitter | 300 | | Low Pressure Flexible Hose | 100 | -------------------------------------------------------------------------------
(4) If the values are more than the permitted values, replace the defective equipment.
5. Close-up
________ Subtask 35-10-00-860-056
A. Bleed the oxygen system
(1)
Close the valve of the tool cylinder.
(2)
On one the oxygen mask stowage boxes:
- operates the PRESS TO TEST AND RESET control slide a sufficient number of times.
Subtask 35-10-00-860-057
B. Put the aircraft back to its initial configuration. NOTE : Make sure that the valve of the oxygen cylinder is open at the end
____
of the procedure.
(1)
Disconnect the tool cylinder.
(2)
Install the oxygen cylinder (Ref. TASK 35-11-41-400-001).
(3)
Fully open the valve of the oxygen cylinder.
(4)
Close the cover of the oxygen compartment.
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35-10-00Page 519
(5)
On all the oxygen mask stowage boxes:
- operate the PRESS TO TEST and RESET control slide a sufficient number of times (to fill the system with oxygen).
(6)
On the panel 21VU, release the OXYGEN/CREW SUPPLY pushbutton switch (the OFF legend comes on).
(7)
De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
(8)
Make sure that the work area is clean and clear of tool(s) and other items.
Subtask 35-10-00-410-056
C. Close Access
(1)
Close the access door 812.
(2)
Remove the access platform(s).
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35-10-00Page 520
CREW OXYGEN - INSPECTION/CHECK
______________________________
TASK 35-10-00-200-001
Inspection of oxygen pressure for the flight crew
1.
Reason for the Job
__________________
Check of the minimum oxygen pressure available to the fligh crew
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific temp indicating
No specific Access platform 3.50 m (11 ft. 6 in.)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
12-14-35-600-001 Servicing of the Oxygen-Replenishing 35-11-41-000-001 Removal of the Crew Oxygen-Storage Cylinder (5750HM) 35-11-41-400-001 Installation of the Crew Oxygen-Storage Cylinder
(5750HM)
R **ON A/C 001-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
35-10-00-991-003 Fig. 601
**ON A/C 051-054,
35-10-00-991-003-A Fig. 601A
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35-10-00Page 601
**ON A/C ALL
3. Job Set-up
__________
Subtask 35-10-00-010-055
A. Get Access
(1)
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