The approach idle mode increases idle speed due to ______.

The approach idle mode increases idle speed due to ______.

• A. Flaps setting
• B. Throttle position
• C. Landing gear being down
• D. Engine speed

Answer: (C)

Approach idle is an automatic engine control state that raises idle thrust to compensate for the extra drag when configuring for landing. When the landing gear is extended, the aircraft experiences increased parasitic drag, which would slow the airplane at a given thrust level. To keep a stable approach speed, the FADEC increases the idle N1, providing more thrust even with the throttles at idle. The gear-down condition is the trigger for this mode, so the higher idle speed is specifically to offset the drag from the landing gear being down.

Approach idle is an automatic engine control state that raises idle thrust to compensate for the extra drag when configuring for landing. When the landing gear is extended, the aircraft experiences increased parasitic drag, which would slow the airplane at a given thrust level. To keep a stable approach speed, the FADEC increases the idle N1, providing more thrust even with the throttles at idle. The gear-down condition is the trigger for this mode, so the higher idle speed is specifically to offset the drag from the landing gear being down.