have been practically the only fire
extinguishing agents used in civil transport aircraft.
However, Halon is an ozone depleting and global
warming chemical,
Halogenated hydrocarbon
Two types of Halons are employed in aviation:
Halon 1301
Halon 1211
Class A, B, or C fires can be controlled by dry
chemical extinguishing agents.
Dry powders
A type fires are best controlled with
water by cooling the material below
its ignition temperature and soaking
the material to prevent re-ignition.
Water Class
In case of a fire, several types of portable
fire extinguishers are available to fight the fire.
The most common types are Halon 1211 and
water.
Cockpit and cabin interiors
Transport aircraft have fixed fire
extinguishing systems installed in
Turbine Engine Compartments
Apu Compartments
Cargo and baggage compartments
Lavatories
acts as a
blanketing agent.
Carbon dioxide
A cartridge
(squib) and frangible disk-type valve are installed in the outlet
of the discharge valve assembly
Discharge Valves
only class A, B, or C.
Halon
monitors the lavatories
and cargo baggage compartments for the presence
of smoke, which is indicative of a fire condition.
Smoke Detectors
contains a
photoelectric cell that detects light refracted by smoke
particles.
Light Refraction Type
The system generates an alarm signal
(both horn and indicator) by detecting a
change in ion density due to smoke in the
cabin.
Ionization Type
are designed
to alarm when they detect the presence of
prominent, specific radiation emissions from
hydrocarbon flames.
Flame detectors optical sensors
is a colorless, odorless gas that is a
byproduct of incomplete combustion.
CArbon monoxide Detectors