As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3047 - DIV - TO ATL DUE TO EXCESSIVE CABIN ALTITUDE MESSAGE AT FL340 WITH CABIN CONTINUING TO CLIMB. MASKS DID NOT DROP. CORRECTIVE ACTION: FOUND AFT CARGO DOOR SEAL HEAVILY DAMAGED AND LEAKING. REPLACED AFT CARGO DOOR SEAL. (LP# 4989180)