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.

 EFF : ALL

35-10-00Page 517

 Flight Crew Oxygen System - Schematic
 Figure 504/TASK 35-10-00-991-005
 EFF :  ALL  35-10-00 Page 518 
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.

 EFF : ALL

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).

 EFF : ALL

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
 EFF : ALL

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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