Engine & APU Fire Protection Flashcards
The Engine/APU Fire Protection System does what?
Detects fires & extinguishes fires
The engine fire protection system also detects ?
Overheat conditions
Both engines & APU have ………… loop fire detection systems
Dual
Dual loops in the engines also detect ……………
Overheats
Fault monitoring in the fire protection is ?
Continuous
How many fire bottles protect both engines?
2 fire bottles protect both engines
How many fire bottles protect the APU?
1
The engine fire switches are locked to the ‘in’ position when no fire is detected. The locks are …………… operated.
Electrically
Pulling the ‘Fire Handle’ switch does what?
- Closes fuel valve
- Closes bleed air valves
- Hydraulic pump depressurised (switch shuts off hydraulic fluid & depressurises the engine driven pump)
- Generator field breaker trips
- Arms the squibs on each fire bottle
The APU fire switch is operated ?
Electrically
APU fire alert requires detection of fire on ……… loops?
Both
If an APU fire signal is detected the APU automatically ……………?
Automatically shuts down
Pulling the APU Fire Switch does what?
- Fuel valve closes
- Bleed air valve closes
- APU shuts down (if it didn’t automatically)
- Air inlet door closes
- Generator field breaker trips
- Fire bottle arms
Is the APU fire bottle automatically or manually discharged?
Manually
If the a/c is on the ground with both engines shutdown & the APU operating, how many loops are required to detect a fire?
Only one detection loop is necessary to detect a fire
If both engines are shutdown & the APU is running & a fire is detectedin the APU, the APU will automatically shutdown and the fire bottle will ……………….?
Automatically discharge
An APU fire can be extinguished manually from the flight deck or ?
By by using the fire controls on the nose gear panel
What do you do if the fire switch fails to unlock?
Use the fire override switch (push & hold the override switch)
What happens to the fire detection system if there’s a loop failure?
Dual loop detection changes to single loop detection