Aalice.541 net.space utzoo!decvax!harpo!npois!alice!sjb Wed Apr 28 17:51:53 1982 Re: shuttle engine blowup? I posted something about this a few weeks ago, when it happened. The story is that engineers were making a test of a shuttle main engine at 109% thrust for 500 seconds (the Columbia never went past 100% I believe). After 323 (I think, but I'm not sure) seconds, it blew to pieces. NASA does not expect this to affect the launch timetable.