As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANT REPORTED, OILY SMOKE IN CABIN FORM BLEEDS. PROBLEM TRACED TO NR 1 BLEED AIR. AIRCRAFT LANDED IN MSO WITHOUT FURTHER PROBLEM. AIRCRAFT FERRIED TO GEG FOR REPAIR. REPLACED P2.5/P3 SWITCHING VALVE I/A/W MAINTENANCE MANUAL. NR 1 BLEED AIR OPS CHECKED GOOD ON GROUND RUN.