What percentage of sensors in the LLWAS can be inoperative while still functioning effectively?

In the Low-Level Windshear Alert System (LLWAS), the system is designed to monitor wind conditions and detect hazardous windshear phenomena that may impact aircraft during takeoff and landing. For the LLWAS to remain effective despite malfunctioning components, a certain percentage of sensors must still be operational.

The correct answer is that the LLWAS can function effectively with up to 50% of its sensors inoperative. This capacity is built into the system to ensure that it can still generate accurate alerts and maintain its primary function of providing safety information to pilots under adverse weather conditions. The redundancy in sensor data allows for continued performance even if a significant number of sensors fail, up to that critical threshold.

This design feature highlights the robustness of the system, ensuring that it can survive partial failures while still providing essential information necessary for flight safety.