As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPANCY: REFERENCE LP 231897 ITEM 1; CLIMBING THROUGH FL300 MODERATE AIRFRAME VIBRATION @ MACH.79 SLOWED TO .7 AND THE VIBRATION WENT AWAY. CORRECTIVE ACTION: C/W TSM05-50-00-810-801-A FOR AIRFRAME VIBRATION/ C/W TYPE (5) INSPECTION. PERFORMED ADJUSTMENT OF THE RUDDER NEUTRAL POSITION REF AMM 27-24-00-820-001-B.