The approach idle mode is activated when the _________. This causes an increased idle speed.

The approach idle mode is activated when the _________. This causes an increased idle speed.

• A. Flaps are up
• B. N2 RPM is high
• C. Engine bleed air is off
• D. Landing gear are down

Answer: (D)

Approach idle mode is used to keep the engine responsive when the aircraft is configured for landing. When the landing gear are extended, the aircraft experiences more drag, so the engine idle is raised to maintain a safe and stable approach and to ensure the engine can respond quickly if a go-around is required. This higher idle speed helps compensate for the drag and kept thrust level during the approach with gear down and flaps set as needed. The other factors listed don’t trigger this mode: flaps up would correspond to a different configuration, high N2 isn’t a trigger for changing idle mode, and bleed air status doesn’t control the idle setting.

Approach idle mode is used to keep the engine responsive when the aircraft is configured for landing. When the landing gear are extended, the aircraft experiences more drag, so the engine idle is raised to maintain a safe and stable approach and to ensure the engine can respond quickly if a go-around is required. This higher idle speed helps compensate for the drag and kept thrust level during the approach with gear down and flaps set as needed. The other factors listed don’t trigger this mode: flaps up would correspond to a different configuration, high N2 isn’t a trigger for changing idle mode, and bleed air status doesn’t control the idle setting.