Fire Protection Flashcards
Which areas of the aircraft have Fire Detection systems?
Engines, APU, Main Wheel Well, Lower Cargo Compartment
Which areas have fire Extinguishing/Suppression systems?
Engine, APU, Lower cargo compartment
SH 8.010 pg 14
What does an illuminated Master FIRE WARN (red) light indicate? What causes it to
illuminate?
FIRE or TEST
Extinguished by pushing light or using BELL CUTOUT switch
SH 8.010 Pg 4 - check this info
SH 8.010 Pg 2
What causes the Fire Warning Bell to sound?
Comes on in conjunction with the FIRE WARN light (test or actual fire detected)
SH 8.010 Pg 2
How can it be silenced?
Pushing either FIRE WARN lights or the BELL CUTOUT.
SH 8.010 Pg 2
What does an illuminated Engine Overheat (amber) light indicate?
an overheat condition
SH 8.010 pg 3
What causes it to illuminate?
Extinguish?
The temperature of a detector has increased to a predetermined limit
SH 8.010 pg 4
Temperature drops below the predetermined limit - COOLS OFF
SH 8.010 pg 4
How many engine fire extinguisher bottles are there?
2 total
SH 8.010 pg 4
Can these bottles be discharged into both engines, or only the respective engine?
2 bottles total - 2 OR 1 discharges into one engine
SH 8.010 pg 5 schematic
What powers the Engine Overheat and Fire Detection system?
Detection = BAT BUS
SH 8.010 pg 3
What powers the Engine Fire Extinguishing system?
Extinguish = HOT battery bus
SH 8.010 pg 3
What does pulling the engine fire switch do?
Lighter colors panels on overhead
Just think ISOLATE & VENTILATE and affects those panels
B - Bleed valve closes
R - Reverser disabled
G - Generator tripped
H - Hydraulic valve closes
F - Fuel valves close (engine fuel valve & spar valve)
S - Squibs & Switch (squib armed & switch able to be turned)
SH 8.010 pg 3
What does rotating the engine fire switch do?
Electronically “fires” a squib, discharging the extinguishing agent into the
related engine. Rotating the switch the other way discharges the remaining
bottle.
SH 8.010 pg 6
How many detector loops does each engine have?
2 loops
What do the loops provide?
Fire and overheat detection
SH 8.010 pg 3
What are the indications of a single loop failure?
No flight deck indication of a single loop failure
SH 8.010 pg 4
What are the indications of a dual loop failure?
FAULT light (with OVHT DET switch in NORMAL) SH 8.010 pg 4
What does an illuminated FAULT (amber) light indicate?
What causes it to illuminate?
Extinguish?
Dual loop failure (with OVHT DET switch in NORMAL)
A or B loop failure (with switch in associated position)
SH 8.010 pg 4
The fault detection loops detects a fault
SH 8.010 pg 4
Doesn’t extinguish
What does an illuminated Engine Fire (red) Switch indicate?
A fire (or a test) *handle is unlocked when lit*
What are indications of an engine fire?
Fire Warning Bell Both master FIRE WARN lights illuminate Related engine fire switch illuminates *related engine overheat alert indications likely illuminate SH 8.010 pg 4
What are the components of the APU Fire Extinguishing system?
APU Fire switch
Single APU Fire bottle
APU bottle discharge light
SH 8.010 pg 9
How many fire extinguisher bottles does the APU fire extinguishing system have?
ONE
SH 8.010 pg 9
What does pulling the APU Fire (red) switch up do?
GBFISH G - generator tripped B - bleed valve closed F - fuel deactivated I - inlet door closed S - squib armed H - handle unlocked *auto shutdown should have occurred, but this will happen anyways if you pull the handle up* SH 8.010 pg 9
Rotating the switch APU Fire (red)?
Fires the APU squib into the APU
Where is the APU Fire Protection Panel located, and what does it do?
RIGHT main wheel well. Same stuff as in the flight deck.
SH 8.010 pg 9
What powers the APU Fire Detection system?
Battery Bus
SH 8.010 pg 8
The APU Fire Extinguishing system?
Hot battery bus
SH 8.010 pg 8
What are the components of the Main Wheel Well Fire Protection system?
Fire detection (only) and a single fire loop in the wheel well SH 8.010 pg 13
What does an illuminated WHEEL WELL (red) light indicate?
Indicates temp has exceeded predetermined limit
Cargo guy cooking weenies
SH 8.010 pg 13
What causes the WHEEL WELL (red) light to illuminate?
Temperature sensed above predetermined limit
SH 8.010 pg 13
What causes the WHEEL WELL (red) light to Extinguish?
Temperature decreases below onset temp
SH 8.010 pg 13
What are the components of the Lower Cargo Fire Protection system?
Smoke detectors (10) 2 fire extinguisher bottles - First bottle discharges for 60 min - Second bottle discharges for 135 additional min to maintain the level of halon in the compartment SH 8.010 pg 18
What does an illuminated DETECTOR FAULT (amber) light indicate?
FAULT in one or more of the detectors
SH 8.010 pg 19
An illuminated Cargo Fire FWD/AFT (red) light?
At least One detector in each loop has detected smoke (they agree)
SH 8.010 pg 16
The FAULT/INOP and OVHT/FIRE TEST switch, when in the FAULT/INOP position, tests
what?
That the system is able to detect faults in itself
What is being tested when fire test switch is in the OVHT/FIRE position?
Testing the fire detection circuitry
SH 8.010 pg 14 or use B737 app and test switches
