As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 2505 - THE CREW REPORTED A LOUD BANGING NOISE AT THE SERVICE DOOR ON CLIMBOUT FROM CLE. THE AIRCRAFT RETURNED TO CLE AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE SERVICE DOOR SEAL LOOSE AND HANGING OUT AT THE BOTTOM. RESECURED THE SERVICE DOOR SEAL AND OPERATIONAL CHECKS WERE GOOD.