How do the landing gear doors actuate?

• A. Mechanically, during landing gear extension or retraction
• B. Electrically
• C. Pneumatically
• D. Hydraulically

Answer: (A)

Mechanically linked to the gear, the doors open and close as the gear extends and retracts. A cam or linkage on the gear leg pushes the doors open to clear the wheel well during extension, and returns them to a closed, flush position as the gear retracts. This synchronization with the gear cycle ensures the doors provide necessary clearance and then streamline the bay for flight, without requiring a separate power source for door operation. Some systems may include dampers to control opening speed, but the actuation is ultimately driven by the gear’s motion.