How long must the engines stay at idle after landing?

How long must the engines stay at idle after landing?

• A. 3 minutes
• B. 5 minutes
• C. 1 minute
• D. 0 minutes

Answer: (A)

After landing, engines are kept at idle for a short cooldown period. This lets oil pressure settle and engine temperatures stabilize before a full shutdown, and it gives time to complete post-landing checks that require the engines to be at a low, steady power setting. Three minutes provides enough time for those conditions to be met without adding unnecessary delay. Choosing zero minutes would skip the cooldown and risk thermal or lubrication issues during shutdown. One minute is typically not long enough for stable engine conditions, and five minutes adds more idle time than the standard procedures call for, wasting time. So three minutes is the appropriate requirement.

After landing, engines are kept at idle for a short cooldown period. This lets oil pressure settle and engine temperatures stabilize before a full shutdown, and it gives time to complete post-landing checks that require the engines to be at a low, steady power setting. Three minutes provides enough time for those conditions to be met without adding unnecessary delay.

Choosing zero minutes would skip the cooldown and risk thermal or lubrication issues during shutdown. One minute is typically not long enough for stable engine conditions, and five minutes adds more idle time than the standard procedures call for, wasting time. So three minutes is the appropriate requirement.