Fire Protection Flashcards
What does pulling the engine fire switch do? are they locked?
Shuts the engine down
Yes, locked unless there is a fire indication
Do both detection loops need to be activated to detect a fire?
Yes, both
What does pulling fire switch do? (5)
- Fuel spar and engine valves close
- Bleed air valve close
- Shuts off hydraulic pump and depressurises it
- Generator field breaker trips
- Fire bottles arm
If fire not out after how many seconds before discharging second bottle?
30sec
Both loops needed to detect for overheat?
Yes
Is APU fire switch locked without a fire?
Yes
How many fire bottles for APU?
1
Does APU automatically shut down with a fire?
Yes
What does pulling APU fire switch do? (6)
APU fuel valve close APU bleed air valve closes APU shuts down (if auto system didn't work) Air inlet door closes Gen breaker trips Fire bottle arms
When is APU fire bottle automatically discharged?
With APU fire on ground with both engines shutdown
If a detection loop fails what happens?
Auto configure to use other loop
If dual loop failure what shows and how fix?
FIRE/OVHT SYS EICAS, reset system with system fail reset switch on aft centre consol
How many smoke detection units in each cargo compartment?
two
Type of smoke detectors?
Photoelectric
How many fire bottles for cargo compartment? When deploy the second one?
two
80min later
What happens when AFT cargo compartment fire arm switch to arm? (3)
- Arms the bottles
- Turns of right recirc fan
- Closes associated cargo compartment heat valve
The FWD cargo fire arm switch does what when armed? (3)
- Arms the bottles
- both recirc fans turned off
- Associated cargo comp heat valve closed
Will high brake temps trigger wheel well fire indication?
No, only high enough temps from an actual fire will set it off
Any extinguishing system for wheel well fire?
No, must lower gear
If must retract gear (for perf) after wheel well fire has gone out how long before retract?
20min
How many loops in fire detection system?
Dual loops
