26 Fire Protection Flashcards
The engines and APU have fire and overheat detection. What is this made up of?
2 loops
1 fire detection unit
Where are the fire loops?
Pylon Nacelle Engine Core Engine fan APU
How many fire extinguisher bottles does each engine have?
2
How many extinguisher bottles does the APU have?
1
What happens if the APU detects a fire on the ground?
It auto shuts down and bottle discharges automatically
When does a fire warning occur?
Both loops send a signal
One loops send a signal when one is failed.
Breaks occurs in the loops within 5s
TEST performed
What happens when the fire pb is pushed? (8 things)
Silences alarm Arms squibs Closes LP fuel valve Closes hydraulic shutoff valve Closes eng bleed valve Closes pack flow valve Cuts off FADEC Deactivates IDG
What happens when the APU fire push button is pushed? (6 things)
Silenced alarm Arms squib Closes LP fuel valve Shuts off fuel pump Shuts down APU Closes the APU bleed valve
How many smoke detectors does the avionics have?
1 in the extraction duct
How many smoke detectors in the cargo bays?
2 in the forward
4 in the aft
They operate in the dual loop principle
How many bottles serve the cargo compartment?
1 bottle
1 nozzle in the fwd
2 nozzles in the aft
Where are the smoke detectors?
Cargo
Lavatories
Avionics
Where are the fire extinguishers
Cargo Avionics Lavatories Engines APU
How long does smoke need to be detected before a warning is given?
More than 5 seconds
Where is the lavatory smoke detector?
Extraction duct
