Final answer:
MLG weight-on-wheels (WOW) sensors are used to detect whether an aircraft's wheels are on the ground or in the air.
Step-by-step explanation:
The purpose of MLG weight-on-wheels (WOW) sensors is to determine whether an aircraft's wheels are on the ground or in the air. These sensors are typically used in aircraft landing gear systems to detect weight changes on the wheels during takeoff and landing. They help trigger important functions such as retracting or extending the landing gear, activating anti-skid systems, and disarming spoilers.