o
Fire Extinguishers. Two 10 pound steel cylinders, equipped with a
quick-release valve assembly are a component of the engine AFES.
Engine AFES cylinders contain Halon fire suppressant and are
pressurized with dry nitrogen.
One of the fire extinguishers
interfaces with the thermal detection system by way of the engine
T/A panel.
This extinguisher activates automatically when the
thermal detection system senses a fire in the engine compartment.
The second fire extinguisher is also used for engine compartment
fires. However, it is activated by pulling the lanyard cable pull
handle of the AFES/MDS.
The AFES/MDS is explained in paragraph 4
(see Figure 5).
Figure 5.
Remote Status Indicator and Fire Extinguisher.
3.
Crew AFES.
The crew AFES is designed to automatically detect and suppress hydrocarbon
fuel fires in the crew compartment of the M992 Ammunition Carrier.
The
operating principal is similar to the engine AFES except for the use of
optical fire sensing assemblies (OFSA) in the crew AFES versus the use of
fire wire sensing elements in the engine AFES for use in fire detection. A
description and illustration of the crew AFES components is provided below.
o
Crew Test and Alarm Panel.
The crew T/A panel provides status
lights and switches and the necessary circuitry for automatic
monitoring of the crew AFES. The crew AFES T/A panel is located on
the overhead of the crew
7
OD1700
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