As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3487 - AFTER DEPARTURE FROM YQT, THE CREW NOTED A FLAPPING NOISE FROM THE PASSENGER DOOR AREA. THE AIRCRAFT RETURNED TO YQT AND LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL SECURED A SHIM FOR THE PASSENGER DOOR SEAL. ALL SYSTEMS OPERATED SATISFACTORILY. (M)