Fire Protection

Question 1

The type of fire detection sensor depends on the model. Which two detection types can be found?

Answer 1

A temperature sensing cable for each engine or three photoconductive detectors per engine.

Question 2

Explain the sequence of operation in the case of an engine fire:

Answer 2

There are two flashers, one per engine in the following format ‘L/R ENGINE FIRE USH TO EXT’. This flashers can be depressed to discharge the extinguishing agent, after successful discharge the Amber ‘D’ light will illuminate.

Question 3

What does the OK green light indicate on the fire flasher?

Answer 3

Will illuminate green to show that the circuit is working during test

Question 4

What is the type of extinguishing agent used?

Answer 4

CBrF3 (bromotrifluoromethane).

Question 5

What are the limitations of the fire extinguishing system in terms of electrical power?

Answer 5

The system can only detect fire if the main bus is on. However, the discharge system is connected to the hot bus. So it can be discharge with the bat switch - OFF.