With the ignition select switch in IGN L or IGN R, placing the ENGINE START switch to FLT provides ignition to which igniters?

With the ignition select switch in IGN L or IGN R, placing the ENGINE START switch to FLT provides ignition to which igniters?

• A. Ignition to the selected igniter only
• B. Ignition to both igniters
• C. No ignition
• D. Ignition to neither igniter

Answer: (B)

Dual igniters provide redundancy for reliable engine starts. The ignition select switch chooses which igniter is normally used for continuous ignition during normal operation. When the ENGINE START switch is set to FLT, the ignition circuits are energized to both igniters, so ignition can occur on either spark source. This maximizes the chance of a successful start or relight, even if one igniter or its circuit has an issue.

Dual igniters provide redundancy for reliable engine starts. The ignition select switch chooses which igniter is normally used for continuous ignition during normal operation. When the ENGINE START switch is set to FLT, the ignition circuits are energized to both igniters, so ignition can occur on either spark source. This maximizes the chance of a successful start or relight, even if one igniter or its circuit has an issue.