As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FAT-ON FLIGHT NUMBER 2490, AFTER APU SHUTDOWN, APU DOOR OPEN CAUTION MESSAGE DISPLAYED, PER CHECKLIST, RESTARTED APU. CAUTION MESSAGE EXTINGUISHED. REMOVED AND REPLACED APU DOOR ACTUATOR. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.