As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, ACCESS COMPARTMENT DOOR CAME OPEN AND AIRCRAFT WOULD NOT PRESSURIZE. DOOR LT EXTINGUISHED AFTER LANDING. UPON ARRIVAL, NO DOORS WERE FOUND TO BE OPEN. AIRCRAFT WAS PRESSURIZED AND NO LEAKS WERE DETECTED. AIRCRAFT DEPARTED WITHOUT FURTHER INCIDENT. NO PRESSURIZATION PROBLEMS WERE NOTED.