As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON CLIMB OUT, CREW HEARD A LOUD BANG AND FELT A CORRESPONDING PRESSURE BUMP. UPON RETURNING TO THE APRON, IT WAS DISCOVERED THAT THE AFT UPPER GUIDE ROLLER ON THE MAIN ENTRANCE DOOR HAD SHEARED OFF. AFTER INSPECTING THE DOOR, THE CREW ELECTED TO CONTINUE THE FLIGHT UNPRESSURIZED. THE A/C RETURNED TO A MAINTENANCE FACILITY WHERE THE DOOR WAS REPLACED.