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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 216-059
 (2)  Make sure that the pressure is not more than 1850 psi at 70°F (21°C).
 NOTE: See Fig. 602 for equivalent portable oxygen cylinder
____ pressures for temperatures other than 70°F (21°C).
 S 966-060
 (3)  
Replace the portable oxygen cylinder, if the gage pressure is below the minimum guideline set for the airline or regulatory authority.

 S 216-009

 (4)  
Make sure the portable oxygen cylinders are correctly installed to the wall-mounted brackets or storage compartments, where applicable.

 S 216-010

 (5)  
Make sure the portable oxygen cylinders are in satisfactory condition:

 (a)  
Make sure the portable oxygen cylinders are clean.

 (b)  
Make sure the portable oxygen cylinders are not damaged.

 

 TASK 35-31-00-206-013
 4. Protective Breathing Equipment (PBE) Check (Fig. 601)
__________________________________________
 A. References
 (1)  
AMM 35-00-00/201, Oxygen

 (2)  
IPC 35-31-00

 B. Access
 (1)  Location Zone
 274 Area Above Ceiling, Right

 C. Procedure
 NOTE: The PBE has a tamper seal which does not have to be removed to
____
 do this check.

 S 916-019
 (1)  Read and obey the safety precautions and general instructions for the oxygen system before you do the maintenance (AMM 35-00-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 216-015
 (2)  Make sure the PBE is in its correct position and the pouch is not inflated.
 NOTE: The foil pouch can be seen through the window on the
____
 stowage box door. The foil pouch must look tightly
 compressed, and a recess in the foil pouch will be
 immediately in back of the oronasal mask cone.

 (a)  Replace the PBE if the foil pouch does not have a vacuum and is inflated.
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