As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE 1 R SERVICE DOOR WAS FOUND TO BE FROZEN SHUT AFTER FLIGHT. HEAT WAS APPLIED TO THE DOOR SEAL AND THE DOOR OPENED. DOOR SEAL WAS FOUND TO BE CONTAMINATED INTERNALLY AND EXTERNALLY WITH WATER. THE SEAL WAS CLEANED AND DRIED AND THE AIRCRAFT WAS RETURNED TO SERVICE. THE SOURCE OF THE MOISTURE HAS YET TO BE DETERMINED.