Fire And Overheat Protection Atlas Flashcards
Which system has fire detection but does not have fire protection?
The main wheel well
Which components have overheat detection?
The engines and pneumatic ducts
What indicates a fault in one of the fire detection loops?
An EICAS STATUS message
How many fire detectors are in the cargo compartment and how do they work?
It is a dual smoke particles sensor system. So long as both detectors are operational both must detect smoke to trigger an indication
What occurs automatically when an APU fire is detected on the ground?
The APU shut down
What occurs when a single fault is detected on an engine fire detection loop during test?
The system reconfigures for single detector operation
What results when faults are detected on both loops in an engine fire detection system?
FIRE/OVHT SYSTEM advisory EICAS message
What warning indications are tested during a fire detection system test?
Fire warning bell
Discreet lights
Master warning lights
Which detectors are checked when the ENG/APU/CARGO FIRE OVHT TEST switch is pushed?
Engines
Cargo
APU
When will the firelight extinguish in the engine fire handle?
When the fire signal no longer exists
What does pulling the engine fire switch do?
Silences the fire warning bell
Closes the associated engine spar valves
Shuts off the hydraulic fluid to the engine driven hydraulic pump
Trips the associated generator field and breaker;
And arms the fire extinguishers
What should you do if the engine fire switch cannot be pulled out during an engine fire?
Push the fire override switch
Pull the handle
What is accomplished by rotating the engine fire switch to the stop?
Discharges selected fire extinguisher into the respective engine nacelle
When will the APU BTL DISCH light be eliminated?
When the APU fire extinguisher has been discharged
How long should you wait before discharging the second fire extinguisher bottle into an engine that continues to have an illuminated fire warning light?
30 seconds
Where is the APU remote control panel located?
Nosewheel struct
What does pushing the nose strut mounted APU shut down switch do?
Shut down the APU
Silence the APU fire warning horn
When does the APU fire warning light extinguish?
When the fire signal no longer exists
What happens to an operating APU when the fire switch is pulled out?
Silences the fire warning bell
Closes the APU fuel valve
Trips the APU generator field and breaker
Closes the APU bleed air valve
Arms the APU fire extinguisher
Shuts down the APU immediately if the auto shut down feature failed or if the handle was pulled with no fire indication
When is the fire bell and warning light inhibited?
During take off from nose gear extension to 400 feet or 20 seconds
When will the AFT cargo fire warning lights go out?
When smoke is no longer detected
What does pushing the FWD cargo compartment armed switch do on the 767–300 passenger?
Turns off the recirculation fans
Arms the extinguishing squibs
Silences is the fire Bell
Closes the associated heat valves
Turns off the nitrogen generating system
Commands the packs to high flow
Where do all fire protection systems receive their power from?
The hot battery bus
How many fire bottles are installed for engine fire protection? Can both be fired into the same engine?
Two bottles, Both maybe used for the same engine
What occurs when the cargo bottle discharge switch is pushed?
Number one bottle is discharged immediately
Number two bottle fires later at a reduced rate.
Eventually both CARGO BTL1 and CARGO BTL2 EICAS messages will be shown
Fire suppression in the main deck cargo compartment is accomplished by pushing the MAIN ARMED switch followed by the DEPR/DISCH switch. What do these actions accomplish?
This depressurises the aircraft and attempts to starve the main deck fire of oxygen needed to burn
How can you silence the fire bell?
Push either Master CAUTION/WARNING reset switch or pulling the fire switch
