Dear 150Driver, I think Torres is closest to the incident your mates have described. My own recollection is also scratcy, however I do recall a courtcase in about 1986 in Central Qld (Rockhampton or thereabouts) when the then CAA tried to prosecute the owners of a light aircraft that had an automotive engine fitted. From memory, evidence was adduced that the aircraft had actually flown, ( seen by a sister in law or something of one of the good ol boys) and then crashed landed. Defence was that the engine fit was experimental and the aircraft had only ever been taxied. (Down a bitchumen road, which involved other authorities) Memory tells me that the not guilty result was helped by CAA Engineering Inspector who reckoned the thing was a Death Trap that was not capable of flight. It did happen! Hope this helps.