As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG - FLIGHT ATTENDANT REPORTED SMOKE AND HAZY CONDITIONS IN CABIN AND LAV SMOKE DETECTOR ACTIVATED. TURNED BOTH PACKS OFF AND RETURNED TO GEG. MAINTANENCE ISOLATED PROBLEM TO CABIN PACK. DEFERRED PER MEL 21-1. AIRCRAFT RELEASED FOR TEST FLIGHT. TEST FLIGHT SATISFACTORY.