15.20 FIRE PROTECTION ZONES👌🏼 Flashcards
1
Q
2 major types of turbine failure
A
- thermodynamic
- mechanical
2
Q
What must multi engine turbine aircraft have as a requirement
A
Engine fire protection system
3
Q
Do APU require fire protection system
A
Yes
4
Q
What occurs when the cooling cycle is upset
A
- turbine blades can melt which causes a sudden thrust loss
5
Q
Explain mechanical turbine failure
A
-fractured or thrown blades can puncture tail cone causing overheating conditions
- can lead to fire
6
Q
How are fires detected
A
- overheat detectors
- rate of temperature rise detectors
- flame detectors
7
Q
2 most common fire detection systems are
A
- spot detectors
- continuous loop system
8
Q
Explain a spot detector system
A
- individual sensors to monitor a fire zone
- e.g. thermal switch system
9
Q
Explain a continuous loop system
A
- typically installed on transport-type aircraft
- provide more complete fire detection coverage by using several loop type sensors
10
Q
Explain thermal switch system
A
- heat sensitive units that complete electrical circuits at a set temperature
11
Q
What are the thermal switch indicator lights connected in
A
Series
12
Q
How does the thermal switch system work
A
- if temp rises above set value
- thermal switch closed
- completing circuit to indicate a fire or overheat conditions
13
Q
Explain thermocouple system
A
- depends on rate of temp rise
- does not give warning when engine slowly overheats (or short circuit)
14
Q
thermocouple wiring system is divided into the following
A
- Detector circuit
- alarm circuit
- test circuit
15
Q
What are optical sensors referred as
A
- flame detectors
