As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3354 - AFTER DEPARTURE FROM DTW, THE CREW NOTED A LOUD SQUEAL FROM THE PASSENGER DOOR. THE CREW ELECTED TO RETURN TO DTW AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL SHIMMED THE PASSENGER DOOR SEAL. ALL SYSTEMS OPERATED SATISFACTORILY. (M)