I watched my CP put the center engine cover on one day.... Then as he was trying to get down, he went face first into the pavement... On another occasion, in high wind conditions at LAS, the FBO called and said the wind blew one lateral and the center engine cover off and it was flapping in the wind beating the hell out of the airplane...(we have the hard plug covers) All this being said. The moral of the story is..... FIND A LARGE TRASHCAN AND TOSS EVERY ENGINE COVER YOU HAVE IN THERE, WALK AWAY AND DON'T LOOK BACK..