"GB" threefiddy.com> wrote in message
news:00bc05d5$0$20320$c3e8da3@news.astraweb.com...

From that link:

"The aircraft's flight data recorder (FDR), cockpit voice recorder and the
air data inertial reference unit (ADIRU) were removed for examination. The
FDR data indicated that, at the time of the occurrence, unusual acceleration
values were recorded in all three planes of movement. The acceleration
values were provided by the aircraft's ADIRU to the aircraft's primary
flight computer, autopilot and other aircraft systems during manual and
automatic flight.

Subsequent examination of the ADIRU revealed that one of several
accelerometers had failed at the time of the occurrence, and that another
accelerometer had failed in June 2001. "

I hope there has been some serious software redesign since then! That 2
accelerometer failures could ruin the day for "the aircraft's primary flight
computer, autopilot and other aircraft systems during manual and automatic
flight" is pretty scary stuff.

That link is worth visiting (thanks Geoff) as amongst other things the
primary flight display indicated the a/c was approaching an overspeed and
the stall speed at the same time! (Yes, I know...) This was before an
uncommanded climb from 38 to 41,000 ft and serious airspeed decay leading
to the stickshaker kicking in.