(1)
If seal is punctured, broken, cut and/or corroded, replace with new part.
(2)
If squib has corrosion on threads replace with new part.
4. Install Cartridge
A. Remove caps and screw squib into bottle fitting. Torque squib to 96 +12 pound-inches.
B. Install lockwire.
C. Remove protective metal foil or cap from squib and connect electrical connector.
D. Test bottle firing circuit continuity (Ref 26-22-0 A/T).
E. Close access panel 3701.
501
May 20/82 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 26-22-21 Page 201
APU FIRE EXTINGUISHER BOTTLE INDICATOR DISCS - REMOVAL/INSTALLATION
1. General
A. One red indicator disc (bottle thermal discharge) and one yellow indicator disc (bottle discharge) are located on the lower right side of the empennage section at approximately station 1064.
2. Removal/Installation Red Indicator Disc (Fig. 401)
A. Remove Red Disc
(1)
Remove snap ring.
(2)
Remove disc using a suction cup or any small pointed tool.
B. Install Red Disc
(1)
Place disc in receptacle.
(2)
Push snap ring in place.
3. Removal/Installation Yellow Indicator Disc (Fig. 401)
A. Remove Yellow Disc
(1)
Remove snap ring.
(2)
Remove disc assembly using a suction cup or any small pointed tool.
NOTE: Check that retainer washer is removed from receptacle.
(3)
Remove retainer washer from disc assembly if necessary.
(4)
Remove yellow disc from retainer.
B. Install Yellow Disc
(1)
Place yellow disc on retainer.
(2)
Install retainer washer on disc and retainer.
(3)
Place disc assembly in receptacle.
(4)
Install snap ring.
500
Aug 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 26-22-31 Page 401
H28229
APU Fire Extinguisher Bottle Indicator Discs Installation 500
26-22-31 Figure 401 Aug 15/67
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PORTABLE FIRE EXTINGUISHERS - DESCRIPTION AND OPERATION
1. General
A. Portable fire extinguishers are located at various positions in the crew and passenger cabins. They provide fire extinguishing capability in these cabins or other areas accessible from them.
2. Carbon Dioxide (CO2) Type
A. A carbon dioxide extinguisher is located in the control cabin adjacent to the first officer's seat. The carbon dioxide extinguisher is identified by the horn type nozzle, and is intended primarily for use in extinguishing electrical fires. Operation is controlled by a trigger mechanism in the handle. Until operated, the trigger is lockwired and sealed (Fig. 1).
3. Water Type
A. Two water type fire extinguishers are in the passenger cabin. One is on the forward RH windscreen and one is in the aft stowage closet. The water type extinguisher is intended for extinguishing nonelectrical fires, and contains an antifreeze agent to retain serviceability at low temperatures. Discharge is effected by pressure from a carbon dioxide cartridge in the extinguisher handle. The pressure is released by twisting the handle of the extinguisher to puncture the cartridge. Operation is controlled by actuation of a thumb-operated lever. Until operated, the handle is lockwired and sealed (Fig. 1).
4. BCF Type
A. One BCF type fire extinguisher is in the RH forward stowage compartment and one is in the aft stowage compartment. The BCF extinguisher is intended for use on electrical and inflammable liquid fires in the control cabin, galley or passenger cabin.
B. The extinguisher is easily removed from its bracket with one hand. To operate, hold the BCF extinguisher in either hand, pull locking pin, direct the nozzle towards the base of the fire source and squeeze the trigger with the palm of the hand. Use a side to side sweeping motion across the width of the fire. Direct all of the extinguishing agent on the fire.
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