You are the second person I've heard with that experience.  A friend of mine 
lost all his Sound Reinforcement system in a similar situation. He was the 
sound contractor for a county airshow with a stage setup and some national 
acts.  An airplane ran over the main distribution cable and provided 240V to 
ground on the entire electrical system. No audio gear or surge protectors 
seem to be designed to handle this and gear is instantly destroyed.  Since 
hearing of this, I always check any 240V service with a multitester before 
plugging in. 
--- Opus-CBCS 1.73a
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