As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE - FLT 4234 - THE CREW REPORTED THAT THE MAIN CABIN DOOR DEVELOPED A LEAK AND THEY LOST PRESSURE. THE AIRCRAFT RETURNED TO CLEVELAND WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE CABIN MAIN DOOR SEAL IAW EMB145 MM 52-18-04. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RELEASED TO SERVICE. (M)