747-400
MAINTENANCE MANUAL
TEST
PORT
LOW PRESSURE LINE
TO THE UPPER
DECK CABIN INLET LINE
TEST CONNECTION ON-OFF INDICATOR SEE C
ELECTROPNEUMATIC
FLOW CONTROL UNIT
RESET
LEVER
RESET SOLENOID
FWD
FLOW CONTROL UNITS
(EXAMPLE)
B
ON 0
F F
ON-OFF INDICATOR C
Test Connections
Figure 501 (Sheet 2)
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MAINTENANCE MANUAL
PSU Oxygen Box
Figure 502
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L83896
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MAINTENANCE MANUAL
A. General
(1) The Simulated Automatic Actuation Test, Alternate (Electrical) Actuation Test, and Oxygen Mask Drop Test can be done with a portable test cylinder. They can also be done with one of the passenger oxygen cylinders installed on the airplane. The High Pressure Leak Test must be done with a portable test cylinder only.
B. Special Tools and Equipment
(1) ME65B50263-1 Gauge - Pressure, 0-30 psi and Hose Assembly, Ashcroft P/N 1009, Stratford, Connecticut (Gage) and Hydraflow Inc., Los Angeles, California (Hose)
C. Standard Tools and Equipment
(1)
Barometer (to determine atmospheric pressure in mm Hg)
(2)
Caps and Plugs - Package of Clean, Protective
(3)
Oxygen cart (oxygen quality air) or Cylinder - Portable Test (0-1850 psi) - Scott Aviation, 225 Erie Street, Lancaster N.Y. (if applicable)
(4)
Gauge - Pressure, 0-150 psi
(5)
Gauge - Pressure, 0-2000 psi with an accuracy of | 2-1/2%, with graduations no more that 100 psi, and a gauge diameter of not less than 4 inches
(6)
Reducer - Pressure, 15 psig (use with the portable test cylinder)
(7)
Rod - Metal, 1/4-inch diameter
(8)
Source - Variable Vacuum, capable of maintaining 25-inch Hg vacuum with minimum flow of 1 cfm
D. Consumable Materials
(1)
G00000 Air - Clean, Dry with no particles or fibers larger 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. The moisture content can not 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 portable test cylinder.
(2)
G00713 Cloth - Clean, Dry, Lint-Free, White Cotton
(3)
G00091 Compound - Oxygen System Leak Detection (MIL-L-25567)
(4)
G00669 Nitrogen per MIL-P-27401 (use with the portable test cylinder) (or)
(5)
G00019 OXYGEN - Chemical Gaseous per MIL-O-27210 Type 1 (use with the portable test cylinder)
(6)
Tape - Masking, J6-3800-0200 (SCOTCH)
E. References
(1) G01505 Copper Lockwire 0.020 inch diameter G01505
(2)
12-15-08/301, Oxygen
(3)
24-22-00/201, Manual Control
(4)
31-61-00/201, Integrated Display System
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747-400
MAINTENANCE MANUAL
(5)
35-00-00/201, Oxygen
(6)
AMM 35-21-06/401, Supernumerary Oxygen Mask
(7) 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(54)
