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737-300/400/500MAINTENANCE MANUAL
 S 014-022
 (5)  
Carefully pull the release pin from the generator firing pin (Fig. 401).

 S 824-023

 (6)  
Move the release cable through and away from the mask lanyard rings.

 E. Procedure - Remove the Oxygen Masks
 S 014-060
 WARNING: WHEN YOU REMOVE THE MASKS, DO NOT PULL THE LANYARDS.
_______ TOO MUCH PRESSURE ON THE RELEASE CABLE WILL RELEASE THE FIRING PIN AND FIRE THE GENERATOR. IF YOU PULL THE RELEASE PIN AND THE GENERATOR FIRES THE GENERATOR TEMPERATURE CAN BE 450°F AND HIGHER. THESE HIGH SURFACE TEMPERATURES CAN BURN YOU. THE GENERATOR MUST BE COOL BEFORE YOU TOUCH IT.
 (1)  On the forward attendant's masks, do the steps that follow:
 (a)  
Remove the screw that attaches the mask tubing clamp to the mask box wall.

 (b)  
Move the clamp away from the tubing.

 S 034-025
 (2)  
On all masks (this does not include the forward attendant's masks), do the steps that follow:

 (a)  
Cut the tiedown strap that holds the open end of the mask tubing clamp.

 (b)  
Move the mask tubing apart and away from the clamp.

 (3)  
Pull the mask tubing from the generator outlets.

 (4)  
Remove the oxygen masks.

 S 024-026
 S 024-027
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 S 224-028
 (5)  If the oxygen generator fired, do the steps that follow:
 (a)  Cut off one inch of the tubing end.
 NOTE: The tubing end attached to the generator outlet can
____ increase in dimension if the generator fires. The mask tubing end can be cut off three times and have sufficient length to be installed.
 (b)  Remove the oxygen generator (Ref 35-22-11/401).
 S 164-029
 (6)  
Clean the oxygen masks (Ref 35-22-31/701).

 S 354-030

 (7)  
If the lavatory and the aft attendant's masks are discarded, do the steps that follow:

 (a)  
Cut the cord that attaches the PULL streamer to the oxygen mask.

 (b)  
Keep the PULL streamer for installation.

 TASK 35-22-31-404-051
 5. Attendant's and Lavatory Oxygen Mask Installation
_________________________________________________
 A. Equipment
 (1)  
Rod or Tool - 0.125 inch diameter

 (2)  
Cord - MIL-C-5040 Type 1, 1/16 diameter (Ref 20-30-51)

 (3)  
Tiedown Strap - MS3367-4-9

 (4)  
Strap Installation Tool - MS90387-1

 (5)  
Sleeve - BACS13S128C

 (6)  
Sleeve - MS51844-82

 (7)  
Sleeve Installation Tool - 51-C-887 from National Telephone Supply Company; 5100 Superior Ave., Cleveland, Ohio, 44183

 B. References
 (1)  
35-22-11/201, Oxygen

 (2)  
35-22-31/201, Oxygen

 (3)  
35-22-11/401, Oxygen

 (4)  
35-22-31/701, Oxygen

 C. Access
 (1)  Location Zone
 100 Upper Half of the Fuselage

 D. Prepare to Install the Oxygen Masks
 S 414-031
 (1)  If no PULL streamer is attached to the lavatory and the aft attendants oxygen masks, do the step that follows:
 (a)  Install the PULL streamer (Fig. 403).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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737-300/400/500
MAINTENANCE MANUAL

OXYGEN BOXSEE A
MASK PACKING 
SEE  B 
FWD 
　
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