As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATL - FLT 1273 - AFTER TAKEOFF FROM ATL, THE AIRCRAFT WOULD NOT PRESSURIZE. CRWE NOTICED THE AFT RIGHT SERVICE DOOR WAS LEAKING AIR. FLIGHT RETURNED TO FIELD AT ATL AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE AFT RIGHT SERVICE DOOR NOT CLOSED COMPLETELY. CLOSED DOOR. DOOR OPERATIONAL CHECK NORMAL. (M)