Fire Protection Flashcards
Which areas of the aircraft have Fire Detection systems?
Engines, APU, Main Wheel Well, Lower Cargo, Lavatory,
Which areas have fire Extinguishing/Suppression systems?
Engine, APU, Lower cargo compartment, Lavatory
What does an illuminated Master FIRE WARN (red) light indicate?
Fire warning conditions detected
What causes it to illuminate?
System test or Fire in Eng ½, APU, Cargo compartment, Main Wheel well
Extinguish?
Extinguishes when either of the Master FIRE WARN lights pressed or condition no longer exists
What causes the Fire Warning Bell to sound?
Comes on in conjunction with the light. Test or fire
How can it be silenced?
Pushing the either Master FIRE WARN lights or Bell cutout
What does an illuminated Engine Overheat (amber) light indicate?
Temp has increased to a predetermined limit.
What causes it to illuminate?
The Engine and APU Fire Detection Module senses overheat condition
Extinguish?
when temp < Overheat Set Point
How many engine fire extinguisher bottles are there?
Two
Can these bottles be discharged into both engines, or only the respective engine?
Either engine but both bottles discharge only into one engine at a time
What powers the Engine Overheat and Fire Detection system?
Battery bus
The Engine Fire Extinguishing system?
Hot Bat Bus
What does pulling the engine fire switch do?
Closes: engine fuel shutoff valve, spar shut off valve, engine bleed air valve, pack valve, Hyd shutoff
valve, deactivates Eng hyd pump. Trips the Generator control Relay and Breaker, Disables thrust
reverser, Arms squibs, Allows the engine fire switch to be rotated for discharge.
What does rotating the engine fire switch do?
Electronically “fires” a squib, discharging the bottle
. How many detector loops does each engine have?
Two
. How many detector loops does each engine have?
Each loop provides both fire and overheat protection
What are the indications of a single loop failure?
No flight deck indication of a single loop failure
A dual loop failure?
Fault light On Fire Detection Panel
. What does an illuminated FAULT (amber) light indicate?
a. With the OVHT DET switch in Normal: both loops failed on an engine.
b. A or B: that the selected loop has failed
Extinguish?
If the condition no longer exists
What does an illuminated Engine Fire (red) Switch indicate?
Fire condition detected
What are indications of an engine fire?
Master Warn lights, Fire bell, fire handle illuminated
What are the components of the APU Fire Extinguishing system?
1Bottle, 1 loop
How many fire extinguisher bottle does the APU fire extinguishing system have?
1
What does pulling the APU Fire (red) switch up do?
Closes APU Fuel Shutoff Valve, Bleed Valve, Inlet Door, Trips Gen, Arms Squib,
Rotating the switch?
Fires bottle squib
Where is the APU Fire Protection Panel located, and what does it do?
Wheel well, Ground horn, flashing red light. Pull handle to discharge bottle, light turns steady until
fire is extinguished.
What powers the APU Fire Detection system?
Bat bus
The APU Fire Extinguishing system?
Hot bat bus
What are the components of the Main Wheel Well Fire Protection system?
Single loop detector
The nose wheel well?
None
What does an illuminated WHEEL WELL (red) light indicate?
Temp detected > Predetermined limit
What causes it to Extinguish?
Temp <limit
What are the components of the Lower Cargo Fire Protection system?
Dual, loop style smoke detectors, 2 bottles
What does an illuminated DETECTOR FAULT (amber) light indicate?
Both loops failed
An illuminated Cargo Fire FWD/AFT (red) light?
Both loops Smoke detected
The FAULT/INOP and OVHT/FIRE TEST switch, when in the FAULT/INOP position, tests what?
Ability to detect a fault
When in the OVHT/FIRE position?
Ability to detect fire
