As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD WHISTLING NOISE FROM MAIN CABIN DOOR, STARTED ABOVE FL 220 TO FL 340. THE WHISTLING WAS LOUD AT FL 220 BUT NOT AS QUIET. AT FL 340. ALL PRESSURE INDICATIONS IN COCKPIT READ NORMAL. CLEANED MAN DOOR SEAL & PERFORMED LEAK CHECK IAW AMM 21-31-00 NO SEALS TORN. ACFT OK FOR SERVICE.