hot wheel assembly. Upon ignition, misting fluid will
accelerate a fire, resulting in rapid fire growth and
excessive damage to the aircraft if it is not extinguished
A broken hydraulic line that causes misting
of petroleum-based fluids around an overheated
dangerous and destructive fire.
application of water fog should be used to
extinguish this type of wheel assembly fire.
tire/wheel assembly presents an explosion
hazard. Therefore, fire-fighting personnel must
exercise good judgment and care to prevent
injuries. The vaporized products of hydraulic
fluid decomposition will cause severe irritation
to the eyes and respiratory tract.
The following safety information pertains to all
aspects of wheel assembly fire-fighting operations:
· Rapid cooling may cause an explosive failure
of a wheel assembly.
· When water fog is used on a wheel assembly
fire, an intermittent application of short bursts
(5 to 10 seconds) every 30 seconds should be
· The effectiveness of Halon 1211 may be
severely reduced under extremely windy
conditions if the Halon cannot be maintained
on the fire source.
· You must take protective measures to prevent
hydraulic fluid from coming into contact with
the eyes. Seek medical attention immediately
should the fluid come in contact with the eyes.
· Positive-pressure, self-contained breathing
apparatus must be worn in fighting fires
associated with hydraulic systems.
· Although Halon 1211 may extinguish
hydraulic fluid fires, reignition may occur
because this agent lacks an adequate cooling
· In a fire, F-14, S-3, and C-5 aircraft with
beryllium brakes may produce irritating or
poisonous gases. These gases are toxic, and
they are respiratory and eye irritants.
· Because heat is transferred from the brake to
concentrated on the brake area. The primary
objective is to prevent the fire from spreading
upward into wheel wells, wing, and fuselage
Q12-16. Where should you direct the fire-fighting
agent for an internal engine fire?
Q12-17. What is the primary agent used to combat
class C electrical fires?
Q12-18. What is the greatest hazard associated with
overheated aircraft wheels and tires?
Q12-19. In what direction should you approach an
aircraft with overheated brakes or a wheel
Q12-20. What are the four materials that usually
contribute to wheel assembly fires?
In this chapter, you have learned about aircraft
procedures. Fire chemistry, fire-fighting agents, and
equipment used in dealing with naval aircraft were also