What safety device is actuated by the compressions and extension of the landing gear strut?

What safety device is actuated by the compressions and extension of the landing gear strut?

• A. Ground safety switch
• B. Parking brake
• C. Landing gear door sensor
• D. Emergency beacon switch

Answer: (A)

The movement of the landing gear strut serves as a weight-on-wheels signal, and the device that uses this motion is the ground safety switch. When the gear is down and the strut is compressed by the aircraft’s weight, the linkage actuates the switch to indicate the airplane is on the ground. In flight, the strut extends and the switch is released, signaling that ground-related interlocks should remain disengaged. The other items listed aren’t directly controlled by the strut’s compression or extension, so they don’t fit this mechanism as closely.

The movement of the landing gear strut serves as a weight-on-wheels signal, and the device that uses this motion is the ground safety switch. When the gear is down and the strut is compressed by the aircraft’s weight, the linkage actuates the switch to indicate the airplane is on the ground. In flight, the strut extends and the switch is released, signaling that ground-related interlocks should remain disengaged. The other items listed aren’t directly controlled by the strut’s compression or extension, so they don’t fit this mechanism as closely.