As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURN TO FIELD DUE TO SMOKE IN THE CABIN AND COCKPIT, ALONG WITH LAVATORY SMOKE INDICATION. INSPECTED BOTH ENGINES FOR LEAKS AND LOOSE FITTINGS. INSPECTED LT AND RT PACK DUCTS AND CLAMPS. FOUND NO DEFECTS. PERFORMED POWER ASSURANCE RUNS. OPS CHECKED GOOD.