As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG FLIGHT NR 2367, FUSELAGE DOOR WARNING THROUGH CLIMB. FOLLOWED APPROPRIATE CHECKLIST, RETURNED TO GEG. CONFIRMED INFLIGHT WARNING TO BE AFT BAGGAGE DOOR WITH NO LOSS OF CABIN PRESSURE. AIRCRAFT FERRIED TO PDX. MAINTENANCE REPLACED THE LOWER FWD ROLLER IAW AMM TASK 52-31-24-400-801, AND REPAIRED IAW HORIZON AIR EO 6-52-145 AND EO 6-52-397. AFT CARGO DOOR CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.