Describe a typical gear extension sequence in terms of door and gear movement.

• A. Doors close before the gear begins to extend.
• B. Gear extends before the doors begin to open.
• C. Doors begin opening; gear actuators extend; gear reaches down position; doors close to enclose the gear.
• D. Gear retracts after doors close without opening.

Answer: (C)

A typical gear extension sequence starts with the doors opening to clear a path for the gear. Once the doors are out of the way, the gear actuators extend the landing gear down into its working position. When the gear reaches the down position and is properly aligned and locked, the doors then close to enclose the gear and form a smooth fairing. This order prevents interference during extension, ensures the gear is fully deployed and secured before being faired, and reduces aerodynamic drag in flight.