Fire Protection Flashcards
If 1 loop is fault and the other triggers an alarm, can we still have an output of alarm,
T or F?
TRUE
If loop A is healthy and didn’t triggered an alarm but the Loop B triggers an alarm, what does it mean?
There’s a Fault
What kind of Fire detection system is used
in Engine and APU?
Continuous Dual Loops
How does the Pneumatic Pressure Loop operate?
When Temperature increase, the pressure will also increase. There’s a Pressure Switch in the responder which is in
the thicker end of the loop. The closed switch triggers the alarm via the control unit.
How does the Semiconductor Loop operate?
Each loop has a metal tube, its electrical resistance decreases as the temperature
increases. The resistance between the central
wire and tube decreases below the threshold, the alarm is triggered.
The APU and Engine Fire detection system activates the same, so what differs the APU from the Engine?
One feature is a ground warning in the nose or main wheel well area (Red flashes and a warning horn sounds) Second, it also automatically shut down and
on some aircraft types it also automatically extinguished
What kind of sensor is used in Wheel Well Area?
Semiconductor loop (Single continous loop)
Fire detection used in the Cargo Compartment?
Dual Sensor Smoke Detectors
What are the conditions to operate the Dual
Smoke Detectors?
(1 Fail) + (1 Alarm) = The output will alarm but using OR Gate
(2 Alarms/ they are both healthy) = The output will alarm by using AND Gate
ENG Fire Indicators?
Local Fire Warning =
-Fire P/B S/W,
-MASTER Control S/W – ENG
Central Warning =
-Master Warning Light,
-Aural Warning/CRC,
-ECAM/EICAS Display Red Message
What will happen when we press MASTER
Warning Light P/B S/W?
The Central Warning is cancelled when
you press the P/B S/W
Each Lavatory smoke detection has?
A single sensor in the lavatory ceiling area
How do you cancel the aural warnings in Lavatories?
By pushing the RESET Button
) What are the Parts of Fire and Overheat Detection Systems?
First – Sensor, Second – Control Unit, Third – Panels for the warnings
Three main components of a basic fire extinguishing system?
Extinguisher Bottle, Discharged Head w/ cartridge (squib), Piping w/ spray nozzle