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Left and Right Engine Start/Ignition Switches

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ENGINE Control Panel

Panel Overview

The left and right engine start/ignition switches are used to control the start sequence and ignition mode for both engines. Each switch has three positions: START, NORM, and CONT.

Control Element Description

L (R) START / IGNITION Selector Knob

  • Position Descriptions:

    • START: Used to initiate engine start on the ground or in flight. The switch remains in this position until start is complete, then automatically returns to NORM.
    • NORM: Normal operating mode where the engine igniters engage automatically when required.
    • CONT: In specific conditions, keeps both igniters active continuously to prevent flameout.

  • System Response:

    • In START or during windmill relight, the FADEC determines ignition activation based on external conditions.
    • In CONT mode, igniters operate continuously to ensure sustained combustion and avoid flameout.

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