CHAPTER 4
AUTOMATIC FIRE EXTINGUISHING SYSTEM
Section 1. EQUIPMENT DESCRIPTION
TM 9-2350-267-10
1. Characteristics
The Automatic Fire Extinguishing System (AFES) is an automatic electric system that,
when actuated, provides fire extinguishing capability for the engine and crew compart-
ments. It consists of test/alarm panels, sensors, and associated equipment explained
later on in this section and the Section Ill operating instructions.
Automatic electric operation will automatically sense and discharge an agent to estinguish
hydrocarbon fires. The crew system provides an automatic electric second shot capability
should the fire continue burning or a second fire occur.
Manual electric operation must be manually activated by the crew to discharge the agent to
extinguish fires. The crew system second shot manual electric activation is available if the
fire continues to burn. It must be manually activated by a crew member.
These systems will not activate unless the crew/engine test and alarm panel maintenance
switlches are in the horizontal power on-normal operational position, (See Section 1),
2. Capabilities
a. AFES Engine Compartment
An automatic electric function that allows detection and discharge of an
agent to extinguish hydrocarbon fires.
A manual discharge backup to the electric function that enables the
operator to electrically discharge an agent into the engine compartment
when the automatic system does not function and fire is detected.
b. AFES Crew Compartment
l An automatic electric function that allows detection and discharge of an
agent to extinguish hydrocarbon fires. There is a second shot discharge
capability for use after 5 seconds if another fire ignites that discharges a
second set of fire extinguishers.
A manual electric discharge function exists to enable the crew to electri-
cally discharge an agent into the crew compartment when the automatic
electric function fails to work and a fire is detected.
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