(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)
G02311 Tape - Masking Non Residue, 3M-226
(7)
G01505 Copper Lockwire 0.020 inch diameter
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
35-21-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
G01505
C. References
(1)
12-15-08/301, Oxygen
(2)
24-22-00/201, Manual Control
(3)
31-61-00/201, Integrated Display System
(4)
35-00-00/201, Oxygen
(5)
AMM 35-21-06/401, Supernumerary Oxygen Mask
(6)
35-21-08/401, Bleed Relief Valve
(7)
35-21-08/501, Bleed Relief Valve
(8)
WDM 35-11-11, 35-11-12, 35-11-13
(9)
SSM 35-11-01
D. Access
(1) Location Zones 124 Forward Cargo Container Compartment, Aft Half Right 200 Upper Half Fuselage
E. Preconditions
S 865-130
(1) The systems that follow must be installed and serviceable to complete this test:
(a)
Electrical Power (AMM 24-22-00/201).
(b)
Supernumerary Oxygen System in serviceable condition (AMM 35-21-00/501).
(c)
Airplane must be in the ground mode (AMM 32-09-02/201).
(d)
Integrated Display System (IDS) (AMM 31-61-00/501).
F. Prepare for Simulated Automatic Actuation and Alternate (Electrical) Actuation Test
S 915-131
(1)
Read and obey the safety precautions and general instructions before you do the maintenance (Ref 35-00-00/201).
(2)
Supply the electrical power (Ref 24-22-00/201).
S 865-133
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
S 865-132
(a) P7 Overhead Circuit Breaker Panel
1) 7D4 OXYGEN VALVE & IND
2) 7D3 OXYGEN RESET PWR
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-134
(4) Do the task: "Obtain Airplane Information Report" (Ref 31-61-00/201)
to apply power to the EICAS (if necessary).
S 015-136
(5) Open the access panels to the oxygen cylinders.
NOTE:____ The oxygen cylinders are attached by snaps and velcro tape.
S 865-137
CAUTION: DO NOT TIGHTEN THE SHUTOFF VALVE ON EACH OXYGEN CYLINDER MORE
_______ THAN 25 POUND-INCHES. THIS CAN CAUSE DAMAGE TO THE SHUTOFF VALVE.
(6) Close the shutoff valve on each oxygen cylinder.
NOTE: The shutoff valve can be closed by hand which is
____ equivalent to 25 pound-inches.
S 485-138
(7) If the oxygen bottle cart (or portable oxygen cylinder) is used to do the test, install as follows:
WARNING:_______LOOSEN THE CONNECTIONS CAREFULLY. THE REMAINING OXYGEN CAN RELEASE WITH A LARGE FORCE AND CAN CAUSE INJURY TO PERSONS AND DAMAGE TO THE AIRPLANE AND EQUIPMENT.
(a)
Disconnect the plug from the coupling assembly at point B (Fig. 501)
(b)
Connect the oxygen bottle cart output hose or the portable test cylinder to the coupling assembly at point B (Fig. 501).
(c)
Remove the plug at point C (Fig 501) and connect a pressure gage (0-2000 psig).
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