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 WARNING : CLEAN THE TOOLS AND MAKE SURE YOUR HANDS ARE CLEAN TO PREVENT
_______ CONTAMINATION OF THE OXYGEN SYSTEM.
 CAUTION : PUT DRY, CLEAN, METAL OR PLASTIC PLUGS ON ALL PIPES OR UNITS REMOVED
_______ TEMPORARILY. PUT EACH PIPE OR UNIT IN A SEALED VINYL BAG.
 1. Reason for the Job__________________
 NOTE : There are alternative methods for this procedure. This task gives are
____ of the methods. For the other methods, refer to the other tasks in this page block.
 To make sure that there are no leaks in the LP oxygen system. Do the test
 with nitrogen. Nitrogen has the same physical properties as oxygen.
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific blanking cap No specific bleed valve No specific isolation valve No specific nitrogen source No specific pressure gage No specific pressure reducing valve No specific sealed vinyl bag No specific access platform 2.00 m (6 ft. 7 in.) 110111-36 1 COUPLING - OXYGEN QUICK DISCONNECT
 EFF : ALL

35-10-00Page 501

 

 B. Consumable Materials
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
Material No. 05-004  USA MIL-L-25567 TYPE I
 OXYGEN LEAK DETECTOR (Ref. 20-31-00)

 C. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION  |IPC-CSN
 -------------------------------------------------------------------------------
3 seal 35-12-01 01 -010 R
 D. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
 from the External Power
 35-10-00-991-001 Fig. 501
 35-10-00-991-002 Fig. 502

 3. Job Set-up
__________

 Subtask 35-10-00-010-054
 A. Get Access
 (1)
 Put the access platform in position at the access door 812.

 (2)
 Open the access door 812.

 EFF : ALL

35-10-00Page 502

 Subtask 35-10-00-865-050
 B. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU OXYGEN/CREW/OXY/SPLY 1HT HA01
 Subtask 35-10-00-860-050
 C. Aircraft Maintenance Configuration
 (Ref. Fig. 501/TASK 35-10-00-991-001)

 (1)
 Close the valve of the oxygen storage cylinder (5750HM).

 (2)
 Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 (3)
 Make sure that the avionics equipment ventilation operates correctly.

 (4)
 Bleed the oxygen system:

 (a)
 On the panel 21VU, release the OXYGEN/CREW SUPPLY pushbutton switch (the OFF legend comes on).

 (b)
 On one of the oxygen-mask stowage boxes: Push the PRESS TO TEST AND RESET control slide a sufficient number of times to make the system empty.

 

 (5)
 In the L Electronics Rack

 (a)
 Disconnect the LP hose (4) 5762HM.

 (b)
 Put a blanking cap on the end of the disconnected hose (4).

 (c)
 Put the end of the hose (4) in a sealed vinyl bag.

 (d)
 Remove the blanking cap supplied for the test from the oxygen stowage bag (5). Make sure that the seal is on this blanking cap.

 (e)
 Install and tighten this blanking cap on the port (2) of the oxygen regulator (1).

 

 EFF : ALL

35-10-00Page 503

 Preparation for the Test
 Figure 501/TASK 35-10-00-991-001
 EFF :  ALL  35-10-00 Page 504 
Feb 01/98
 CES 

 

 Subtask 35-10-00-480-050
 D. Preparation of the Test Installation
 (Ref. Fig. 502/TASK 35-10-00-991-002)

 (1)
 Get a nitrogen source.
　
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