If a tailwind start shows no N1 indication, what action should be taken?

If a tailwind start shows no N1 indication, what action should be taken?

• A. Manually abort the start
• B. Continue to starter cutoff
• C. Reduce throttle and retry
• D. Check N2 only

Answer: (A)

When the engine start isn’t showing N1, the engine isn’t actually starting. N1 is the signal that the engine’s spool is accelerating and the start is progressing, so no N1 means a failed or incomplete start. Abort the start manually. This stops the start sequence right away, prevents a hung or dry-run start, and allows you to reset and diagnose or retry safely. Continuing to the starter cutoff isn’t appropriate because there’s no indication the engine is starting. Reducing throttle and retrying won’t fix a missing N1 signal, and relying on N2 alone isn’t helpful when there’s no N1 to show start progression.

When the engine start isn’t showing N1, the engine isn’t actually starting. N1 is the signal that the engine’s spool is accelerating and the start is progressing, so no N1 means a failed or incomplete start.

Abort the start manually. This stops the start sequence right away, prevents a hung or dry-run start, and allows you to reset and diagnose or retry safely.

Continuing to the starter cutoff isn’t appropriate because there’s no indication the engine is starting. Reducing throttle and retrying won’t fix a missing N1 signal, and relying on N2 alone isn’t helpful when there’s no N1 to show start progression.