What triggers the Ground Avoidance Advisory Function (GAAF)?

What triggers the Ground Avoidance Advisory Function (GAAF)?

• A. When gear is up and the altitude is below 500 ft
• B. When the descent rate exceeds 960 ft/min with gear up
• C. When the aircraft is on final approach
• D. When flying at low speeds below 150 knots

Answer: (B)

The Ground Avoidance Advisory Function (GAAF) is designed to prevent potential ground impacts by alerting pilots to certain flight conditions that could lead to accidents. The correct scenario that triggers the GAAF is when the descent rate exceeds 960 ft/min with the landing gear in the up position. This specific condition is critical because a high descent rate, combined with the landing gear being retracted, indicates that the aircraft is in a potentially dangerous situation where it could fly into terrain or experience a hard landing. When the descent rate exceeds this threshold, it serves as a significant warning sign that corrective action may be necessary to avoid an undesirable outcome. The system ensures that pilots are alerted to check their aircraft's configuration and descent profile to maintain safety during flight operations. The other scenarios mentioned may relate to low-level flying or specific phases of flight, but they do not represent the precise conditions under which the GAAF activates. The focus on the descent rate exceeding a specific limit while the gear is up is key to understanding the safety mechanism provided by the GAAF.

The Ground Avoidance Advisory Function (GAAF) is designed to prevent potential ground impacts by alerting pilots to certain flight conditions that could lead to accidents. The correct scenario that triggers the GAAF is when the descent rate exceeds 960 ft/min with the landing gear in the up position. This specific condition is critical because a high descent rate, combined with the landing gear being retracted, indicates that the aircraft is in a potentially dangerous situation where it could fly into terrain or experience a hard landing.

When the descent rate exceeds this threshold, it serves as a significant warning sign that corrective action may be necessary to avoid an undesirable outcome. The system ensures that pilots are alerted to check their aircraft's configuration and descent profile to maintain safety during flight operations.

The other scenarios mentioned may relate to low-level flying or specific phases of flight, but they do not represent the precise conditions under which the GAAF activates. The focus on the descent rate exceeding a specific limit while the gear is up is key to understanding the safety mechanism provided by the GAAF.