As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- FLIGHT 2844 THE CREW REPORTED A LOUD SQUEAL IN THE MAIN CABIN DOOR FOLLOWED BY A PARTIAL LOSS OF PRESSURIZATION. THE AIRCRAFT RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED AN OPERATIONAL CHECK OF THE PRESSURIZATION SYSTEM IN AUTO AND MANUAL MODES WITH NO DEFECTS NOTED, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.