Which idle setting would typically be used during approach?

• A. Flight Idle
• B. Ground Idle
• C. Approach Idle
• D. Landing Idle

Answer: (C)

The setting used during approach is approach idle. This idle level is meant to be just enough thrust to keep the airplane on the desired descent path and maintain the target approach speed, while minimizing throttle input to reduce descent overspeed and fuel burn. Having engines near idle also allows for a smooth, controllable descent with flaps and gear extended, and it keeps a quick throttle response available if a go-around is required.

Flight idle is a general in-flight idle and may not provide the exact energy management desired for the approach phase. Ground idle is for engine operation on the ground, and landing idle isn’t a standard setting used in the approach phase.