As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH FREQUENCY VIBRATION HEARD & FELT ON FLIGHT DECK & FWD LAV. FOUND EXTERNAL POWER DOOR OPEN UPON ARRIVAL. INSPECTED EXTERNAL POWER DOOR AND SURROUNDING AREA. NO DEFECTS NOTED. VERIFIED EXTERNAL POWER DOOR CLOSES AND SECURES PROPERLY IAW AMM 52-49-02-400-801. NO OTHER DEFECTS NOTED, ACFT OK FOR SERVICE.