In what type of weather conditions is continuous ignition required?

Continuous ignition is required in moderate or heavier intensity rainfall because these conditions can significantly increase the risk of engine flameout due to the potential for water ingestion during flight. When the aircraft is exposed to substantial precipitation, it creates an environment where the likelihood of an engine stall or failure increases if ignition is not maintained continuously.

The necessity for continuous ignition ensures that the engines remain operational despite the adverse weather. This is crucial for maintaining engine performance and preventing situations that could lead to a loss of thrust, especially during critical phases of flight like takeoff and landing.

In contrast, light rain, clear skies, and heavy snow do not typically present the same level of risk for engine flameout that would warrant continuous ignition. Light rain may not have enough intensity to cause significant concern, while clear skies inherently do not pose any threat to engine operation. Heavy snow may require other conditions to be considered, but it is primarily the intensity of precipitation that makes moderate or heavier rainfall particularly demanding in terms of engine management.