As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT/CHK 2049 - AIRFRAME VIBRATION - SEE FORM- FL 220-260 310-320 KIAS STOPS WHEN RUDDER TRIM IS NOT .2R OR .3R. NO ENGINE OR FLIGHT CONTROL INDICATIONS. INSPECTED NLG DOORS AND ACCOMPLISHED TR320- 5280-10-0005A SECTION (I) REMOVED AND REPLACED BOTH FWD HINGE OF AFT DOORS AND PROGRAMMED GEAR SWING WITH IN 100FH REF L/P 4823926.