Fire and Overheat Protection Flashcards
What do the guarded L/R ENG FIRE PUSH switchlights do?
BIGHAF when pressed the following occur
B bleed, the engine bleed PRSOV is closed
I Ignition, the igniters are inhibited
G Generator, the engine generator is disconnected
H Hydraulic, the hydraulic SOV is closed
A Arm, the engine fire bottles are armed
F Fuel, the engine fuel SOV is closed
The Engine and APU areas are protected by ______ fire detection loops. Normally _____ loops must detect a fire/overheat condition to produce the appropriate warning indications
Two/both
It is not allowable to dispatch with one fire detection loop inoperative for a given area.
False
What will happen if the APU detects a fire on the ground? In flight?
Ground—shuts down the APU and fires the bottle automatically. In flight–shuts down but does not automatically fire the bottle.
What should the pilot see when conducting a fire system test?
7 red lights—2 master warning, APU FIRE, both ENG FIRE and FORE/AFT cargo fire lights.
5 green lights—-2 ENG push to disch lights, one APU push to disch light, one cargo push to disch light and FIRE SYS OK green light on ED2.
There are _______ smoke detectors in the forward cargo area and ______ in the aft.
3 smoke detectors and forward and 2 smoke detectors in the aft compartment.
What happens when you push the discharge switchlight for the cargo fire protection system?
The first of the two Halon bottles discharges rapidly. The other discharges slowly over approximately 60 minutes
What is the warning associated with discharge of a portable fire extinguisher in the flight deck?
All flight crew members must wear O2 masks set to 100%.
The lavatory fire bottle is discharged by _____________________
Automatically melting a heat sensitive capsule.
APU FIRE PUSH guarded switchlight
GASPL when pressed the following things take place
G Generator, the APU generator trips offline A Arm, the APU fire bottle is armed S SOV, the APU fuel SOV is closed P Pump, the APU fuel pump turns off L LCV, the APU load control valve closes
Bottle 1 or 2 ARMED PUSH TO DISC switchlights
Pressing causes the associated bottle’s squib to fire releasing halon gas into the engines. The APU bottle can only be fired into the APU, and the engine bottles can only be fired into the engines. Both can be used in one engine.
Is there a way to test the smoke detector in the lavatory?
Yes, a pushbutton is located on the detector mounted on the ceiling. When pressed, the SMOKE AFT LAV warning message illuminates on ED1
How many fire detection loops in the APU?
two
Can a flight be dispatched with one engine or APU fire detection loop inop?
Yes
How many overheat detection loops are in the main landing gear bay?
one
How many fire detectors are in the forward and aft cargo compartments?
three in the forward two in the aft
If we extinguish a fire with the cargo bottle in the forward cargo compartment what can be done for a fire in the aft cargo compartment?
Nothing. A landing should be made as soon as possible
Why must we fly within 60 minutes of a suitable airport while carrying cargo?
the fire extinguishing system provides 60 minutes of fire suppression
What is the restriction for use of the portable halon extinguisher on the flight deck?
both pilots must wear their oxygen masks selected to 100 percent
How does halon work to fight a fire?
it eliminates oxygen in the air causing the fire to suffocate
