Fire Detection/ Protection Questions Flashcards
Are the cockpit and cabin protected from fire?
Yes
Cockpit 1 hand-held halon fire extinguisher
Cabin 3 hand-held halon fire extinguisher (1 fwd. & 2 aft); one water extinguisher (aft)
How are the engines and APU protected from fire?
Engines: 2 halon fire bottles
APU: 1 halon fire bottle dedicated to the APU only
Can both engine fire bottles be used for ones engine if needed?
Yes
What is power source for engine and APU fire detection and protection?
Engine Detection DC ESS
Engine protection HOT BATT
APU Detection DC ESS
APU Protection DC ESS
Describe the engine and APU fire detection system
Engine: 8 pneumatic fire detection system (2 loops) per engine
APU: 2 pneumatic fire detectors (2 loops)
Describe the fire test
Press and hold the test button on the overhead panel for a minimum of 3 seconds, but no more than 10 seconds if the APU is running or it will automatically shut down the APU
Aural warnings (2)
•Fire Bell
•Triple Chime
Visual indication • Overhead panel (6 lights) Fire handle 1 Fire handle 2 Cargo smoke (FWD) extinguisher button Cargo smoke (AFT) extinguisher button APU extinguisher button APU EMER STOP ( top half of button)
•Glare shield (2 lights)
Master warning light (left)
Master warning light (right)
•EICAS (7 messages) Eng 1 fire (CAS message) Eng 2 fire (CAS message) Cargo fwd smoke (CAS message) Cargo aft smoke (CAS message) APU fire (CAS message) FIRE (Engine 1 ITT gauge) FIRE (Engine 2 ITT gauge)
What happens when an engine fire handle is pulled?
Closes respective engine fuel SOV
Closes respective engine hydraulic SOV
Closes respective engine bleed SOV
What is an indication of an APU fire?
Fire bell
Red stripe in the EMER STOP button
APU FIRE is displayed on the EICAS
Will the APU automatically shut down if a fire is detected?
Only on the ground
What happens if the APU EMER STOP button is pushed after a fire has been detected?
APU shuts off immediately without a 1-minute cool-down
What happens if the APU EMER STOP button is not pushed after a fire has been detected?
After one minute the APU FIRE EXTG button illuminates
Will the APU fire extinguisher automatically discharge?
No
How many smoke detectors are installed in the cargo compartments?
3 detectors in the FWD compartment
2 detectors in the AFT compartment
What happens to the forward cargo compartment in the event smoke is detected?
Recirculation fan shuts off
Ventilation outflow valve closes
What is the purpose of the recirc fan off and ventilation outflow valve closing?
Prevents oxygen from entering the compartment
Prevents halon agent from escaping into the aircraft’s cabin
What airplane systems have fire detection and protection?
Engines
APU
Cargo Compartments
Lavatories
How many extinguishing bottles are installed for the cargo compartments?
2 bottles used for both compartments
1 high-rate bottle and 1 low-rate bottle
What is the difference between the high-rate bottle and the low-rate bottle?
High rate bottle saturated the compartment immediately
Low rate bottle maintains saturation over a duration of time
How long will the low-rate bottle remain active in the compartment?
60 min
Can one bottle be used for one compartment and the other bottle for the other compartment?
No. Only one compartment may be selected (FWD or AFT)
What happens when a cargo extinguishing button is pushed if smoke has been detected?
High rate bottle discharges immediately
Low-rate bottle discharges after one minute if the airplane is in flight
If airplane is on the ground (weight-on-wheels) the low rate bottle will NOT automatically discharge
During flight, can the low rate bottle be discharged before the minute is up?
Yes, by pushing the extinguishing button again
How can the low-rate bottle be discharged if the airplane is on the ground (weight-on-wheels)?
The extinguishing button must be pushed again
Can cargo extinguishing be used if smoke is detected?
Yes. The high-rate bottle extinguishing button must be pushed twice, once to arm the bottle and once to discharge the bottle
The low-rate bottle automatically discharges after the one minute if in flight
How are the lavs protected from fire?
Heat-sensitive extinguishers in the lab waste bins automatically discharge if a predetermined temperature is reached