In the landing configuration, GPWS typically monitors the radar altimeter, the air data computer, the instrument landing system and which other parameter?

In the landing configuration, GPWS typically monitors the radar altimeter, the air data computer, the instrument landing system and which other parameter?

• A. Radar altimeter
• B. Air data computer
• C. Instrument landing system
• D. Throttle position

Answer: (D)

On final approach, GPWS combines several inputs to judge whether a warning is warranted as you near the ground. The radar altimeter gives your precise height above terrain, the air data computer provides speed and vertical speed information, and the instrument landing system confirms you’re aligned with the runway and on the correct glide path. The extra parameter it uses in landing configuration is throttle position. Knowing the thrust lever position tells GPWS your energy state—whether you’re in a normal landing setup or actively in a go-around/low-power situation. This helps the system decide if a perceived descent or proximity to terrain is truly dangerous or just part of an intended maneuver, reducing false warnings.

On final approach, GPWS combines several inputs to judge whether a warning is warranted as you near the ground. The radar altimeter gives your precise height above terrain, the air data computer provides speed and vertical speed information, and the instrument landing system confirms you’re aligned with the runway and on the correct glide path. The extra parameter it uses in landing configuration is throttle position. Knowing the thrust lever position tells GPWS your energy state—whether you’re in a normal landing setup or actively in a go-around/low-power situation. This helps the system decide if a perceived descent or proximity to terrain is truly dangerous or just part of an intended maneuver, reducing false warnings.