As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF AT CTS, ACFT HAD STRONG VIBRATION IN AIRFRAME UNTIL FLAPS REACHED FLAPS ONE POSITION. PERFORMED COMPLETE INSPECTION OF AIR WINGS TAIL AND FUSELAGE. FOUND CRACKED FITTING LT FORE FLAP ATTACH 11B. ALSO, FOUND LT FORE AND MID FLAP SEAL DAMAGED. REPLACED FITTING (P/N 654U6Q75-103).