Which of the following indicates a fault has been
detected in one of the fire detector loops?
EICAS Caution alert message
EICAS Status message
Fire signal
What happens when a single loop fault has been
detected during an engine fire detection system
test?
Fire detection becomes inoperative
The system reconfigures for single detector operation
Overheat detection becomes inoperative
How many & what type of fire detectors are used in
each cargo compartment?
One smoke detector plus 2 fans
Dual loop temperature sensors
Two smoke detectors
During initial power up, dual fire/overheat faults in
an engine fire detection system are indicated by:
A FIRE/OVHT SYSTEM advisory
A fire warning
An overheat caution
Normal cargo fire detection requires:
Both temperature sensors indicating temperatures higher than 31°C (87°F)
Either of the two smoke detectors in the cargo compartment sensing smoke
Both smoke detectors in the cargo compartment sensing smoke
Fault monitoring of the cargo bay smoke detectors
occurs when:
The cargo heat switches are placed ON
The cargo bay air circulating fans begin to operate
A cargo FIRE/OVERHEAT system test is performed
What warning indications are tested when a
Fire/overheat test swirtch is pushed?
The Master warning/caution lights & fire bell only
The fire warning bell, discrete lights and master warning lights
The fire warning light & bell only
What indication confirms both engine fire
extinguisher bottle squibs and firing circuits are
operational?
The associated engine squib light on the squib test panel illuminates during a squib test.
The associated engine squib light on the squib test panel does not illuminate during a squib test
The discrete engine fire bottle discharge lights illuminate & the associated EICAS messages appear on the
EICAS display
What does pulling the Engine Fire Switch do?
Disconnects the generator drive
Closes the APU bleed air shutoff valve
Closes associated engine & spar valves
What should you do if the Engine Fire Switch cannot
be pulled out during an engine fire?
Push in on the Engine Fire Switch and then pull.
Rotate the Engine Fire Switch & pull
Push the Fire Override Switch then pull the handle
What happens when the Engine Fire Switch is
rotated to the stop?
Arms the fire extinguisher squib
Discharges the selected fire extinguisher into the respective engine nacelle
Closes the engine & spar fuel valves & disconnects the hydraulic pump
Can both fire bottles be discharged into either
engine?
No.
Yes
How long should you wait before discharging the
second fire extinguisher bottle into an engine that
continues to have an illuminated fire warning light?
20 seconds
No time delay
10 seconds
30 seconds
What happens to an operating APU when the Fire
Switch is pulled out?
It will shut down immediately
Nothing unless the fire light is on
It will shutdown 60 seconds after the bleed valve closes
When is the fire bell & warning light inhibited?
From brake release till 400 feet reached or 20 sec.
During T/O from 80 knots to 400 feet or 20 sec.
During T/O from nose gear extension to 400 feet or 20 sec.
When will the AFT Cargo Fire Warning Lights go
out?
When the fire extinguisher bottle is discharged
When the Fire signal no longer exists
When the applicable Cargo Fire Switch is pushed
Which fire detection system(s) is (are) not tested
continuously after powerup?
Cargo compartments
Wheel well
Cargo compartments & wheel well
APU & cargo compartments
Which system fire detection loops are tested
continuously?
Engines
Equipment cooling
Lavatories
Wheel well
You see FIRE/OVHT SYST amber message on the
EICAS. What condition could cause this panel
indication?
Fire protection not being available to the assocaited system
Two inoperative detection loops of an assocaited system
An inoperative fire bottle squib
An inoperative wheel well fire detection loop
What does arming the forward cargo fire
extinguisher do?
Turns off the RIGHT Recirculation Fan
Turns off Both Recirculation Fans
Turns off the LEFT Recirculation Fan
Turns off Both air conditioning packs
The main wheel well fire detection system consists
of :
A single fire detection loop
A double fire detection loop
A double fire detection loop when AC power is available.
The main gear wheel well has fire detection &
warning only. There is no fire extinguishing system.
The nose gear wheel well does not have a fire
detection system.
True
False.
Overheat detection systems are installed for both
engines, struts, and pneumatic ducts in the wing
and body areas.
False.
True
A Fire is sensed in the APU. The APU Fire Switch is
pulled.
It shuts down the APU, closes the APU fuel valve, trips the APU generator off, arms the APU fire extinguisher
bottle & closes the APU air supply valve .
It closes the APU fuel valve, trips the APU generator off, closes the APU air supply valve, shuts down the APU
& arms the APU fire extinguisher bottle.
It shuts down the APU, closes the APU fuel valve, trips the APU generator off, closes the APU air supply
valve, & arms the APU fire extinguisher bottle.
