Ignition System Flashcards
1
Q
What are the different modes for ignition?
A
- Normal - Automatic ignition supplied during engine start (with throttles out of cutoff), and whenever engine anti ice is selected
- ON - Continuous ignition (regardless of throttle micro-switch position, anti-icing, or start control relay position)
2
Q
Break down the Exciter box
A
- Two exciters per engine
- One o’clock on engine casing
- Converts 28 VDC to 3,100 volts at 3 amps and sends to igniters
- Green ignition light on whenever the exciter box is powered
3
Q
Break down the Spark Igniters
A
- Two each engine (5 and 7 o’clock positions)
- Malfunction of one doesn’t affect the other
- Spark rate is 1-4 sparks per second
4
Q
Explain the main usage for ignition mode “Normal”
A
- Engine Start
- Use of engine anti-ice
- Other routine operations
5
Q
Explain the main usage for ignition mode “ON”
A
- Takeoffs and landings
- Emergency air restart
- Emergency descents
- Stalls
- Severe turbulence
- Heavy Rain
6
Q
What does the engine synchronizer do?
A
Synchronizes the engine, gets rid of the wa wa wa wa sound heard from the cabin.
7
Q
How does the control box for the Engine Synchronizer work?
A
- Receives ac signals from N1 and N2 tach-generators, then adjusts right (slave) engine
- N1 range - RPM +/- 1.5%
- N2 range - RPM +/- 1%
- Master signal from left engine
- Speed setting actuator in right nacelle
8
Q
Clarify what each operation setting does for the Engine Synchronizer.
A
- ON - Synchronization Indicator will illuminate
- OFF - Actuator centers and light extinguishes
9
Q
Should the Engine Synchronizer be on or off for takeoffs and landings?
A
OFF
10
Q
Lack of synchronization is most noticable where?
A
Rear seats - N1
Cockpit - N2