As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB, PRESSURE FLOW LIGHT CAME ON THRU 9000 FT AND COULD NOT PRESSURIZE THE AIRCRAFT. AIRCRAFT LANDED BACK TO DEPARTURE AIRPORT. MAINTENANCE FOUND THE MID CARGO DOOR SEAL AND THE EE COMPARTMENT DOOR SEAL NOT PROPERLY INSTALLED AND DAMAGED. BOTH SEALS REPAIRED AND AIRCRAFT DISPATCHED SERVICEABLE.