26 Fire Protection Flashcards
Which areas of the aircraft have smoke detection?
Cargo compartments
Lavatories
Avionics bay
Which areas of the aircraft have fire extinguishing?
Cargo compartments
Engines
APU
Lavatories
How many fire detection loops are there in the engines? What about the APU?
Two identical loops (A and B) mounted in both engines and in the APU
How many fire extinguishing bottles are there in the engines and in the APU?
Two in each engine
One in the APU
When does a fire warning appear in the flight deck?
If both A and B loops send a fire signal, or
One loops sends a fire signal and the other is failed, or
Breaks in both loops occur within 5s of each other (flame effect), or
A test is performed on the FIRE panel
When does a fire loop-fault caution appear in the flight deck?
One loop is failed, or
Both loops have failed, or
The Fire Detection Unit (FDU) fails
What is an FDU?
Fire Detection Unit
(It makes up part of the fire and overheat detection system, along with loops A and B)
What are the 8 things that happen when the flight crew pushes the ENG 1(2) FIRE push button?
Silences the aural fire warning
Arms the fire extinguisher squibs
Closes the low-pressure fuel valve
Closes the hydraulic fire shut off valve
Closes the engine bleed valve
Closes the pack flow control valve
Cuts off FADEC power supply
Deactivates the Integrated Drive Generator (IDG)
Describe what happens if an APU fire is detected on the ground
The APU initiates an automatic shutdown sequence:
-APU low pressure fuel shutoff valve closes
-ECB receives a signal that starts the shutdown sequence
-The extinguisher bottle discharges automatically (3 seconds after the appearance of the fire warning)
How long does smoke have to be detected for before a single chime and a MASTER CAUTION on the flight deck?
More than 5 seconds
Where is the smoke detector fitted in the lavatories?
In the air extraction duct of the lavatory
What happens if there is a fire in the lavatory waste bin?
Each lavatory wastebin has an automatic fire extinguishing system
How many smoke detectors are fitted in the forward and aft cargo compartments of an A319 and A320? Where are they located?
2 in the forward cargo compartment
4 in the aft cargo compartment
They are located in the ceiling panel cavities
The smoke detectors are linked to one of the two detection loops
FCOM 26-50-10
How many smoke detectors are fitted in the forward and aft cargo compartments of an A321? Where are they located?
4 in the forward cargo compartment
6 in the aft cargo compartment
They are located in the ceiling panel cavities
The smoke detectors are linked to one of the two detection loops
FCOM 26-50-10
When does smoke in a cargo compartment activate the cargo smoke warning?
If both smoke detectors detect smoke, or
If one smoke detectors detects smoke and the other is inoperative
