As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN WITH REPORT OF SMOKE IN THE CABIN IN THE 1ST CLASS AREA. PERFORMED SMOKE CONDITIONAL INSPECTION AMM 05-51-56 TO STEP 4B. INSPECTED LAVATORY’S, GALLEYS & FIRST CLASS CABIN AREA, NO ABNORMALITIES FOUND AT THIS TIME. R & R BOTH LT & RT RECIRCULATION HEPA & CHARCOAL FILTERS IAW AMM 21-25-02.