As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON CLIMB OUT, THE CABIN PRESSURE WAS RELEASED OUT THE AFT SERVICE DOOR. THE ACFT DIVERTED TO THE NEAREST MAINTENANCE FACILITY WHERE MAINTENANCE DISCOVERED A DAMAGED DOOR HOOK AND AN UNATTACHED HOOK SPRING. THE HOOK WAS REPLACED AND THE SPRING WAS RE-ATTACHED, THE DOOR WAS THEN RE-RIGGED AND THE ACFT WAS RETURNED TO SERVICE.