As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LOUD SQUEAL FROM PASSENGER DOOR ON INITIAL CLIMBOUT. CREW ELECTED TO RETURN TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND SEAL WAS NOT INFLATING. MAINTENANCE CLEANED SEAL AND PERFORMED OPERATIONAL CHECKS. NO DEFECTS NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.