TM 9-2350-287-10
CHAPTER 4
AUTOMATIC FIRE EXTINGUISHING SYSTEM (AFES)
Section I. EQUIPMENT DESCRIPTION
Characteristics
The Automatic Fire Extinguishing System (AFES) is an automatic electrical system that, when activated, provides fire
extinguishing capability for the engine and crew compartments. It consists of test and alarm (T/A) panels, sensors, and
associated equipment explained later in this section and in Section III, Operating Instructions.
Automatic electrical operation will automatically sense and discharge an agent to extinguish hydrocarbon fires. The crew
system provides an automatic electrical second-shot capability should the fire continue burning or a second fire occur.
Manual electrical operation must be manually activated by the crew to discharge the agent to extinguish fires. The crew
system second-shot manual electrical activation is available if the fire continues to burn. That system must be manually
activated by a crew member.
These systems will not activate unless the crew/engine T/A panel maintenance switches are in the horizontal AFES
POWER ON normal operational position.
Capabilities
AFES Engine Compartment:
•
An automatic electrical function that allows detection and discharge of an agent to extinguish hydrocarbon
fires.
•
A manual discharge backup to the electrical 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.
AFES Crew Compartment:
•
An automatic electrical 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 electrical discharge function that enables the crew to electrically discharge an agent into the crew or
engine compartment when the automatic electrical function fails to work and a fire is detected.
•
A manual electrical discharge capability that allows for a second-shot capability after 5 seconds if another fire
ignites that discharges a second set of fire extinguishers.
4-1
