As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLUTTER IN ELEVATOR STARTED DURING DESCENT. SLOWED TO 180 KNOTS AND IT STOPPED. SPEED BACK TO 185 AND IT STARTED AGAIN WITH FLAPS 15. FLUTTERED AGAIN AT 165 KONTS. SAME INDICATION WITH AP ON OR OFF. TRIMS APPEARED NORMAL. REPLACED TRIM TAB INBOARD BEARING RETAINER