(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

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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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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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