As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM SEA TO BZN AFT SERVICE DOOR WARNING LIGHT ILLUMINATED. AIRCRAFT DIVERTED TO GEG AND LANDED WITHOUT INCIDENT. INSPECTED AFT SERVICE DOOR AND FOUND OUTER HANDLE NOT FLUSH. ADJUSTED FLAP COVER. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.