I don't know about the 738 but back in 1991 my company had a 747 go supersonic after an autopilot induced upset. As I recall it went up mach 1.2 and only caused minor damage. Most of the damage was things like the fiberglass blowout panels on the top and bottom of the wing. The aircraft returned to service and flew several more years before being scrapped. Of course we nicknamed her "Christine". <img border="0" title="" alt="[Razz]" src="tongue.gif" />