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)
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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
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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
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4
Q

Explain the main usage for ignition mode “Normal”

A
  • Engine Start
  • Use of engine anti-ice
  • Other routine operations
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5
Q

Explain the main usage for ignition mode “ON”

A
  • Takeoffs and landings
  • Emergency air restart
  • Emergency descents
  • Stalls
  • Severe turbulence
  • Heavy Rain
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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.

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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
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8
Q

Clarify what each operation setting does for the Engine Synchronizer.

A
  • ON - Synchronization Indicator will illuminate
  • OFF - Actuator centers and light extinguishes
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9
Q

Should the Engine Synchronizer be on or off for takeoffs and landings?

A

OFF

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10
Q

Lack of synchronization is most noticable where?

A

Rear seats - N1
Cockpit - N2

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