As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4442. WHEN SELECTING FLAPS 20 DEGREES, AIRFRAME SHOOK AND BUFFETED. ONLY OCCURS ABOVE 195 KTS. SLOWING OR SELECTING FLAPS 30 DEGREES, WILL END THE BUFFETING. SECURED SCREWS ON FWD WING TO FUSELAGE FAIRING AND RESEALED. INSPECTED FLAPS, FLAPS HINGES AND FLAP ACTUATORS NO DEFECTS NOTED.