What law governs airplane crashes?
What law governs an airplane crash is decided by whether the airplane accident involved an air carrier, like a commercial commuter or passenger airline or civilian accident. If the airplane crash was a civilian accident, then the rules that apply are similar to the “Rules of the Road” and legal negligence standards of ordinary and reasonable care. A pilot flying such aircraft must use reasonable care in flying a plane; a mechanic is to use reasonable care in fixing an airplane, etc.
