With the ENGINE START switch in CONT and IGN L selected, which igniter is used?

With the ENGINE START switch in CONT and IGN L selected, which igniter is used?

• A. Right igniter for both engines
• B. Left igniter for Engine 1 only
• C. Left igniter for use on both engines
• D. Right igniter for Engine 2 only

Answer: (C)

With the ENGINE START switch in CONT and IGN L selected, the left igniter becomes the active spark source for starting both engines. The ignition system in this configuration uses the left igniter as the common channel during start, providing ignition to the combustors of both engines when ignition is commanded from the left side. The continuous mode keeps the igniter energized to improve light-off reliability, so the left igniter is responsible for initiating ignition on either engine during this start sequence. If the right igniter were selected, it would not be used in this setup.

With the ENGINE START switch in CONT and IGN L selected, the left igniter becomes the active spark source for starting both engines. The ignition system in this configuration uses the left igniter as the common channel during start, providing ignition to the combustors of both engines when ignition is commanded from the left side. The continuous mode keeps the igniter energized to improve light-off reliability, so the left igniter is responsible for initiating ignition on either engine during this start sequence. If the right igniter were selected, it would not be used in this setup.