What is the role of limit switches in a gear retraction/extension system?

• A. Detect gear position to control movement and interlocks.
• B. Lubricate hinges.
• C. Provide lighting.
• D. Measure wing attitude.

Answer: (A)

Limit switches act as position sensors for the gear retraction/extension system. As the gear reaches its fully extended or fully retracted position, a mechanical action on the switch sends a signal to the gear control logic. That signal tells the actuators to stop moving and allows safe sequencing with other systems, such as door positions and interlocks. In short, these switches confirm when the gear is in a known end position and enable the controls to stop movement and coordinate with other safety or indication systems. They’re not for lubrication, lighting, or measuring wing attitude.