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Home > Ordnance Documents and other related manuals > > Figure 5: Remote Status Indicator and Fire Extinguisher.
Figure 3. Engine Test and Alarm Panels.
Figure 6. Crew AFES Test and Alarm Panel

Maintenance of the Automatic Fire Extinguisher System (AFES), M992
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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






Western Governors University

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