Continuous engine ignition must be used during which condition?

• A. Takeoff and landing on contaminated runway
• B. Takeoff with crosswind of 15 knots or greater
• C. Moderate or greater Rain
• D. Thunderstorms

Answer: (A)

Continuous ignition is used to prevent engine flameout during high‑risk phases where the engine is under heavy demand and the intake can be disrupted. On a contaminated runway—where water, slush, or debris can be ingested or cause fluctuating airflow—the engine is more prone to momentary flame instability during takeoff and landing. Keeping the igniters active helps re‑light quickly if the flame tries to go out, maintaining stable operation as the aircraft transitions from ground to air or slows during approach.

The other scenarios don’t by themselves create the same automatic need for continuous ignition. A crosswind threshold, rain, or thunderstorms introduce different hazards and procedures, but continuous ignition is specifically emphasized for takeoff and landing on contaminated surfaces to guard against flameout from ingestion and unstable power changes.