Fire Protection Flashcards
Where does the aircraft have fire protection
Engine/ Wheel well
Exhaust pipe
APU
How does the fire detection system works
Its is a closed loop system connected to pressure sensing device. The line is filled with gas, the pressure inside the line will increase when it is heated. When the pressure crossed a certain threshold it will activate the warning device in the cockpit
How many loops does the aircraft have
6
How many smoke detectors does the aircraft have
Pax 4 - 1 and 2 are in the main cabin, 3 is in the lavatory and 4 is in the baggage compartment.
Cargo 4 - all are in the cargo hold
How does the smoke detector work
Photoelectric detection
They reset themselves when the smoke clears
What is used to extinguish fires
6.5 lbs bottle of halon
How many bottes of halon are on board
1 APU
1 In each wing root for the engines
PAX 2 bottles in the baggade compartament
How many bottes of halon are on board
1 APU
1 In each wing root for the engines
PAX 2 bottles in the baggage compartment
What is the red blowout disc for
To prevent the system from over pressurizing and doing damage to the system. Acts as a relief valve
Can you shoot both bottles of halon into one engine
Yes
What happens when you pull the Fire T handle
- Fuel shut off
- Hydraulic shut off
- Bleed Shutoff
- Engine air inlet deice system closes
- Auto feather
- Arm squibs
What is class C smoke detection
Gives an indication on the panel that there is smoke in the baggage compartment. There are two halon bottles. First is an instant release of all halon to put the fire out. The second is slow release to keep the fire suppressed. It will last 45min-1hour form the time of the button press
How many fire detection loops are in each engine
Engine accessories
Wheel well
Tail pipe
Can fire extinguisher be discharged when the airplane is not powered
Yes. Fire handle is on a hot battery bus
Where does the extinguishing agent discharged
Engine accessory and wheel well
When do you see ABLE light, When do you see INOP
ABLE Only during a fire test. INOP when the bottle has low pressure or empty
How to test fire detection system
Press TEST, Observe 5 sets of 4 lights (Including the APU)
How do you know if fuel and hydraulic shutoff valves are closed
Fire panel light FUEL HYD [CLOSED] lights are lit
Why do we put APU SHUTOFF/EXTG switch in CLOSE and not EXTG
To verify CLOED light illuminated. So there is no fuel entering the system
If the smoke detection system is activated an the alarm sounds, how is it reset
As the smoke level drops to a safe level, it resets automatically
The sensor tube detects an overheat condition by means of
Expention of internal gasses in its core
Fire suppression is available in the
Engine area and wheel well area
In case of fire, both fire extinguishing bottles can be discharged to either engine
True
The APU has both fire detector and fire extinguisher in its compartment
True
