As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG- AFT PASSENGER DOOR INDICATED OPEN IN FLIGHT AT 23,000 FEET. DESCENDED TO 13,000 FEET AND LIGHT WENT OUT. LIGHT WAS ILLUMINATING ON AND OFF DURING DESCENT. PRESSURE INDICATED NORMAL. AIRCRAFT LANDED WITHOUT INCIDENT. CLEANED AND LUBED HANDLE AND DOOR PROXIMITY SENSORS. NO PARTS REPLACED. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.