What is the purpose of a gust lock?

• A. To prevent engine failure
• B. To secure cargo doors
• C. To hold a door open in the fully opened position
• D. To secure the cockpit door

Answer: (C)

A gust lock is a mechanism primarily designed to hold control surfaces of an aircraft in a fixed position, especially when parked or during maintenance. This locking device essentially prevents any movement of these surfaces caused by wind or other external forces, which could lead to damage or misalignment.

In the context of the options provided, the choice involving holding a door open in the fully opened position aligns well with the purpose of a gust lock. When a door is held open, particularly in windy conditions, using a gust lock ensures that it remains safely in place, preventing it from swinging or closing unexpectedly.

Thus, this choice accurately reflects the functional aspect of a gust lock in providing stability and security to doors during operations. This understanding is essential in recognizing the application of gust locks in aerospace settings and maintenance practices.