As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT-PWM - FLT 1274 - AFTER TAKEOFF A NOISE WAS HEARD AT THE FORWARD MAIN ENTRY DOOR. THE NOISE STOPPED AND THEN STARTED AGAIN. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE ENVIRONMENTAL SEAL DAMAGED AND HANGING OUT OF THE DOOR. THE DAMAGED PART OF THE SEAL WAS REMOVED THE PART PROGRAMMED FOR REPLACEMENT. (M)