Angle of attack information is provided on the AOA indexer when the ______.

• A. The landing gear is down and locked
• B. Flaps are set to landing setting
• C. The angle of attack is below 8.8 units on the AOA indicator
• D. Airspeed is 5 to 10 knots above stall speed

Answer: (A)

Angle of attack information on the AOA indexer is activated when the aircraft is configured for landing, specifically when the landing gear is down and locked. This setup brings the pilot’s attention to stall margins and speed control during approach and landing, giving a clear indication of AoA only when it’s most relevant. The display isn’t tied to flaps alone, a specific AoA value, or a speed threshold, but to the gear-down condition that signals the approach/landing phase.