(e)  
Release the PTT switch on the ACP.

 S 415-051
 (14)
 Put the oxygen mask/regulator in its box (AMM 35-11-18/201).

 S 715-054

 (15)
 Make sure the captain's boom microphone operates correctly (AMM 23-51-00/501).

 E. Put the Airplane Back to Its Usual Condition
 S 865-249
 (1)  Remove the electrical power if it is not necessary
 (AMM 24-22-00/201).

 TASK 35-11-00-795-033
 6.  Crew Oxygen Leak Test_____________________
 A. General
 (1)  The leak test of the crew oxygen system is done with a portable test cylinder.
 B. Standard Tools and Equipment
 (1)  
Cylinder - Portable Test (0-1850 psi) - Scott Aviation, 225 Erie Street, Lancaster N.Y. (if applicable)

 (2)  
Gage - Pressure, 0-150 psi

 (3)  
Gage - Pressure, 0-2000 psi, with an accuracy of 2-1/2 percent with no more than 100 psi graduation, and a diameter of not less than 4 inches.

 (4)  
Caps or Plugs - Package of Clean, Protective

 (5)  
Hoses - Flexible, Clean High Pressure

 (6)  
Fittings - Tee, Clean (as applicable)

 C. Consumable Materials
 (1)  
G00669 Nitrogen per MIL-P-27401 (to be used with portable test cylinder) (or)

 (2)  
G00000 Air - Clean, Dry, with no particles or fibers greater than 100 microns in the longest dimension per cubic foot of air. It must not have no more than 3 PPM total hydrocarbon by weight or 7 PPM by volume. A moisture content not to exceed 0.00002 grams per liter of air at 70°F and 760 MM mercury. This is equivalent to a dew point of -63.6°F at 760 MM mercury. This air is to be used with a portable test cylinder.

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CREW OXYGEN CYLINDER SEE A
MEDIUM PRESSURE LINE (REF)
PRESSURE REDUCER (REF)
MEDIUM PRESSURE LINE (REF)
PRESSURE TRANSDUCER (REF)
ACCESS DOOR (REF) POINT A POINT B
SHUTOFF VALVE (REF)
CREW OXYGEN CYLINDER A
Test Connections Figure 501
CREW OXYGEN CYLINDERS (REF)
PRESSURE TRANSDUCER (REF)
FWD
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FLOW BLINKER  MASK/REGULATOR ASSEMBLY SEE A 
FLOW BLINKER 
OXYGEN MASK 
SHUTOFF VALVE 
SLIDING CONTROL 
SLIDING CONTROL  MASK  REGULATOR DILUTER DEMAND 
MASK IN BOX (LIDS CLOSED)  MASK IN BOX (LIDS OPEN) 

PNEUMATIC HARNESS
MASK/REGULATOR ASSEMBLY (SHOWN INFLATED)
A
DILUTER DEMAND REGULATOR
SEE B OXYGEN DILUTION CONTROL
DILUTION 
CONTROL 
HARNESS 
INFLATION EARS 
(2 LOCATIONS) 
NORMAL 
POSITION 
PRESS-
TO-TEST 
KNOB 

DILUTER DEMAND REGULATOR
B

Mask/Regulator Assembly
Figure 502

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 (3)  
G00019 OXYGEN - Chemical Gaseous per MIL-O-27210 Type 1 (to be used with the portable test cylinder)

 (4)  
G00091 Compound - Oxygen System Leak Detection (MIL-L-25567)

 (5)  
G00713 Cloth - Clean, Dry, Lint-Free, White Cotton

 (6) G10505 Copper Lockwire 0.020 inch diameter G10505
 D. References
　
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本文鏈接地址：747-400 AMM 飛機維護手冊 氧氣 OXYGEN(20)