Contents
  1. Fire test
  2. Fire detection loops
  3. Fire bottles
  4. Failures

Engine Fire Protection

Also from: APU Fire Protection


Consists of (for each engine):


Pushing an engine FIRE pb sw:


Pushing the APU FIRE pb sw:


Fire test

APU

Check the FIRE pb sw is in and guarded, and the AGENT light is extinguished. Pressing the TEST button gives:

Also check that the APU fire extinguisher overpressure indication (red disc) is in place.


Engines

Pressing the TEST button gives:


Fire detection loops

The fire detection loops are gas filled tubes whose pressure changes with temperature. If the pressure increases, a fire indication is generated, whereas a drop in pressure indicates a fault. The fire detection loops feed into an FDU (there is 1 FDU per engine, including the APU).


Fire bottles

The bottles each have 1 squib with dual electrical supply, including the HOT bus. The extinguishing agent is Halon.


Failures

ENG 1(2) FIRE LOOP A(B) FAULT- fire detection remains fully operational after a single loop fails
ENG 1(2) FIRE DET FAULT- both loops or the FDU [Fire Detection Unit] have failed
- if both loops break within 5s, a fire warning is triggered and does not extinguish

Categories: Airbus A330 | Fire Protection | APU | Power Plant


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