As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 7800 FROM PDT TO GEG: ON CLIMB IT WAS DISCOVERED THAT THE REAR CARGO DOOR WARNING ENUNCIATOR LIGHT CAME ON. PILOT LANDED BACK IN PDT AND OPENED AND RECLOSED THE DOOR. ENUNCIATOR LIGHT WENT OUT AND PILOT DEPARTED PDT AND ARRIVED IN GEG WITH NO INCIDENTS.