As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. MODERATE AIRFRAME VIBRATION AT 30 KIAS, CLIMBING THROUGH FL 260. RAPID ONSET, GRADUAL REDUCTION AT 300 - 305 KIAS. NOT VISIBLE ON FLIGHT CONTROL PAGE, VIBRATION RATE 60 - 75 HZ. VIBRATION DID NOT CHANGE WITH POWER REDUCTION. REPLACED THE LT ELEVATOR NR 1 HINGE FITTING & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK. ALSO SEE RELATED REPORT ON AALA 201605319004.