As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED BAD VIBRATION IN THE YOKE AT FL360 AND .70 MACH. SLOWED AIRCRAFT TO .65 MACH VIBRATION DID NOT GO AWAY. THE AIRCRAFT DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED ELEVATOR AUTOPILOT SERVO.OPERATIONAL CHECKS WERE GOOD