Fire Protection Flashcards
A total of ___ bottles are available to extinguish an engine fire, and _____ bottles available to extinguish an APU fire.
2,1
During normal operations, both engine overheat detector loops must detect a fire before a warning generates (T/F).
True
Describe the fire bottle discharge with an annunciated forward cargo fire in flight.
The high rate bottle discharges first, followed by the low rate bottle one minute later.
What are the indications that the lavatory waste bin extinguisher has discharged?
There is no flight deck or cabin indication that the bottle has discharged
What aircraft systems have fire detection and protection?
Engines, APU, cargo compartments, lavatories
Pushing the test button on the fire extinguisher will test which systems?
Cargo smoke detection, engine fire detection, APU fire detection
What overhead panel indications display during the fire test?
CARGO SMOKE FWD Extinguisher CARGO SMOKE AFT Extinguisher APU FIRE APU EMER STOP (Upper half) ENGINE 1 FIRE HANDLE ENGINE 2 FIRE HANDLE
What should be seen/heard during the fire test?
6-2-2-7
Overhead Panel: FWD CARGO SMOKE AFT CARGO SMOKE APU EMER STOP APU FIRE ENGINE 1 FIRE HANDLE ENGINE 2 FIRE HANDLE
Aural Warnings
Continuous fire bell
Triple chime
Glareshield:
Master Warning Left
Master Warning Right
EICAS: CARGO SMOKE FWD CARGO SMOKE AFT ENGINE 1 FIRE ENGINE 2 FIRE APU FIRE ITT GAUGE 1 FIRE ITT GAUGE 2 FIRE
What happens if you do a fire test with the APU running and you hold the test button for more than 10 seconds?
APU will shut down
What is available in the flight deck to combat a fire?
A handheld fire extinguisher
How is the cabin protected from fire?
Four handheld fire extinguishers (2 forward and 2 aft)
Can both engine fire extinguishing bottles be used for one engine if needed?
Yes
How many fire extinguishing bottle shots do you have for the engine
2, A and B. Both bottles can be used for one engine, or one bottle on each engine.
What does pulling an engine fire handle do?
Closes the respective engine fuel shutoff valve
Closes the respective hydraulic shutoff valve
Closes the respective bleed shutoff valve
Closes the crossfeed valve
Does pulling an engine fire handle work without power on the aircraft?
Yes, fire bottles, fuel SOV, hydraulic SOV are on the HOT BATT BUSES
Does pulling the engine fire handle discharge the bottle?
No
Describe the engine and APU fire detection system
Engine and APU are monitored by two detector loops
What are the initial indications of an APU fire?
Fire bell and master warning triple chime, red stripe in the APU EMER STOP button, APU FIRE EICAS and 2 master warning lights
On the ground, the APU will shut down automatically ______ seconds after the fire condition is sensed
10
When will the APU automatically shut down on the ground for a fire?
10 seconds after fire detection and the APU EMER STOP button has not been pressed
Will the APU automatically shut down in flight for a fire?
No
What happens when the APU EMER STOP button is pushed after a fire has been detected?
APU shuts down immediately without a one minute cooldown.
APU shutoff valve closes
APU FIRE EXTG button illuminates
What happens if the APU EMER STOP button is not pushed after a fire has been detected?
After one minute, the APU FIRE EXTG illuminates.
On the ground, the APU will automatically shut down after 10 seconds.
What does it take for the APU FIRE EXTINGUISHER light to illuminate?
APU EMER STOP button has been pushed in when an APU fire is detected, or one minute after detection with no pilot action
When does the red bar illuminate on the APU EMER STOP button?
When an APU fire is detected
What is the importance of pressing the APU EMER STOP button before using the APU FIRE EXTG button?
With the APU running, it would act as a venturi and suck the halon overboard, wasting the only halon fire bottle
Pressing the APU FIRE EXTINGUISHER button causes what?
APU fire bottle discharges
APU shuts down
APU fuel shutoff valve closes
Can the low rate bottle be discharged before the one minute is up for the cargo compartment in flight?
Yes, by pushing the associated fire extinguisher button again
How can the low rate cargo compartment fire bottle discharge automatically on the ground after one minute?
The flight crew must push the fire extinguisher button again
Will the low rate cargo fire extinguisher bottle discharge automatically on the ground after one minute?
The flight crew has to push the extinguisher button again
Can cargo fire extinguishing be used if no smoke is detected?
Yes
If no smoke is detected, explain the logic for using the CARGO FIRE EXINGUISHER button in flight.
Press once to arm the high rate bottle
Press again to fire the high rate and arm the low rate bottle
The low rate bottle will automatically deploy after one minute
If no smoke is detected, explain the logic for the CARGO FIRE EXTINGUISHER button on the ground.
Press once to arm the high rate bottle
Press again to discharge high rate bottle and arm low rate bottle
Press a third time to discharge the low rate bottle
If smoke is detected, explain the logic for the CARGO FIRE EXTINGUISHER button on the ground
The cargo fire extinguisher button must be pushed twice. First time the high rate bottle discharges immediately and arms the low rate bottle. Second time discharges the low rate bottle
If smoke is detected, explain the the logic for the CARGO FIRE EXTINGUISHER in flight
Pushed once, the high rate bottle is discharged immediately. After one minute the low rate bottle discharges
How many fire bottles are installed for the cargo compartments?
2, one high rate and one low rate
What is the difference between the low rate and high rate cargo extinguisher bottles?
The high rate bottle discharges immediately. The low rate protects the compartment from relighting for 75 minutes
How long does the low rate bottle protect the selected cargo compartment?
75 minutes
Can one cargo fire extinguisher bottle be used for one cargo compartment and the other for the other cargo compartment?
No, they must both be used for the same cargo compartment
How are the lavatories protected from fire?
One fire extinguisher bottle located in each waste container that automatically discharges when the temperature exceeds a certain limit
What are the indications that smoke is detected in either lavatory?
LAV SMOKE EICAS message
Two master warning lights illuminate
Aural alarm in the lavatory
Rainbow light will illuminate flashing orange
Smoke detector light in the lav will illuminate
When the lavatory smoke detector is set off, will the flight deck know which lavatory it is?
No. The generic EICAS LAV SMOKE message illuminates and the cabin rainbow light must be used in the cabin to determine which bathroom it is
Which fire extinguisher bottles on the aircraft work automatically?
Lavatory trash container
Halon fire extinguishers should be used on which type of fires?
Electrical and flammable liquid fire
Will pulling the engine fire handle cause the extinguisher bottle to deploy?
No, the handle must be rotated counterclockwise to deploy the first bottle
How to you deploy the second bottle to the same engine?
Use the respective fire handle and rotate clockwise
What does it mean if you deploy a fire bottle and the CAS message is still active?
The fire is not out
On what buses are the fire extinguisher bottles?
1A/1B HOT BATT BUS 1
2A/2B HOT BATT BUS 2
