As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION FELT IN FLIGHT DURING CRUISE. DURING INSPECTION FOUND BROKEN WEB ON RUDDER ASSEMBLY. ALSO, THE RIB THAT IS COVERED BY THIS WEB ITS DAMAGED AND DELAMINATED, REFERENCE IPC NR 55-91-40 FIG 15 ITEMS 40, 50 AND 60. WORK IN PROGRESS.