As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT FOR LANDING, THE PILOT PUT THE AUTO PILOT MODE TO VS. THE ACFT PITCHED DOWN WITH STRONG VIBRATIONS AND BUFFETING. DISCONNECTED THE AUTO PILOT AND PUT THE ENGINES TO IDLE POWER AND SLOWED THE ACFT, VIBATION DISAPPEARED. ELEVATOR TRIM PUSH ROD ASSY FOUND FRACTURED AT AFT END BEFORE CLEVIS.