Where is the GPT typically located and what does it do?

• A. It is typically mounted on the actuating mechanism or door assembly and provides electrical signals to cockpit indicators showing gear position.
• B. It measures hydraulic fluid temperature.
• C. It monitors wheel speed.
• D. It controls landing gear doors.

Answer: (A)

The Gear Position Transmitter (GPT) lives on the landing gear actuating mechanism or door assembly, and its job is to provide electrical signals to cockpit indicators that show the gear position. Because it moves with the gear and doors, the signals it sends true reflect the actual geometry of the gear at any moment, so pilots see accurate up/down/transition status on the cockpit indicators. This information also feeds the control logic and warning systems, helping to prevent unsafe configurations, like retracting with misaligned doors. Other tasks, such as measuring hydraulic fluid temperature or monitoring wheel speed, are handled by different sensors in the system, and the function of the GPT is specifically to report position rather than to actuate doors.