Aircraft Miscellaneous System

Question 1

What type of extinguisher is used for engine compartment and what are the precautions taken?

Answer 1

Methyl Bromide (MB) fire extinguishers are used in the engine compartment. MB is very toxic and thus not to be used in the vicinity of aircrews.

Question 2

What type of extinguisher is used for wheel bay fires and why it is not used in engine compartment

Answer 2

Dry Powder/Chemical fire extinguishers are commonly used for wheel bay fires. It is not used in the engine compartment as it creates a mess.

Question 3

Where are the fire extinguishers located?

Answer 3

Hand-Held fire extinguishers are placed in the cockpit and cabin. The remaining areas have cockpit-controlled fire fighting systems.

Question 4

Two types of fire detectors (2)

Answer 4

Continuous & Discrete/Unit.

Question 5

Discrete/Unit-type fire detectors are individually selected to warn of different temperatures for different locations (3)

Answer 5

Melting link detector - Detector melt, not reset-able
Thermocouple detector - Generation of an electrical signal
Differential expansion switch - Metallic strip bend to make electrical contact [uses dissimilar metals to close electrical contact when heated]

Question 6

What is the main purpose of using the Quill Shaft in the Airframe Mounted Accessory Drive [AMAD] Gearbox?

Answer 6

They are meant to protect driven components and gearbox in the event of overload.