(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
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 氧气 OXYGEN(20)
