This seems much like the Malaysian Airlines B777-200 on 3 August 2005 (Flight MH 124) from Perth to Kuala Lumpur:
Read more about that
here
From that incident, the FAA report contains:
Since [AD 2005-10-03] was issued, we received a recent report of a
significant nose-up pitch event on a Boeing Model 777-200 series airplane
while climbing through 36,000 feet altitude. The flight crew disconnected
the autopilot and stabilized the airplane, during which time the airplane
climbed above 41,000 feet, decelerated to a minimum speed of 158 knots,
and activated the stick shaker. A review of the flight data recorder shows
there were abrupt and persistent errors in the outputs of the ADIRU. These
errors were caused by the OPS using data from faulted (failed) sensors.
This problem exists in all software versions after P/N 3470-HNC-100-03,
beginning with P/N 3477-HNC-100-04 approved in 1998 and including the
versions mandated by AD 2005-10-03. While these versions have been
installed on many airplanes before we issued AD 2005-10-03, they had not
caused an incident until recently, and the problem was therefore unknown
until then. OPS using data from faulted sensors, if not corrected, could
result in anomalies of the fly-by-wire primary flight control, autopilot,
auto-throttle, pilot display, and auto-brake systems, which could result
in high pilot workload, deviation from the intended flight path, and
possible loss of control of the airplane. ................