As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 35000 FT AND 54 MINUTES IN THE FLIGHT AT CRUISE, THE AIRCRAFT ABRUPTLY PITCHED UP AND AUTOPILOT DISENGAGED STICK SHAKER OCCURED ON PITCH UP AND DURING RECOVERY AUTOPILOT WAS ABLE TO ENGAGE. CMC SHOWS MISCOMPARE CONTROL COLUMN COMAND AND ELEVATOR SERVO IAW FIM PERFORMED RESET TEST OF AIOP B2 MODULE TEST GOOD TRANSITORY CONDTION PERFORMED OPS CHECK OF ELEVATOR SERVO IAW AMM 22-11-05 OPC GOOD