What happens if there is a fault with the Air/Ground system?

• A. The system will shut down completely
• B. A single fault will not affect operation
• C. The aircraft will automatically switch to ground mode
• D. It will trigger an immediate maintenance alert

Answer: (B)

A fault-tolerant design is at work here. The Air/Ground system in the PC-12 NGX is constructed with redundancy and fault isolation, so a single fault in one part of the system does not take the whole system offline. If one channel or path develops a fault, the other healthy channel continues to provide the necessary air/ground information, allowing normal operation to continue. You’ll typically see a caution or maintenance alert indicating that a fault exists, but it doesn’t force the system to shut down or force an automatic switch to some “ground mode.” That’s why the best answer is that a single fault will not affect operation.