As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET CAUTION MESSAGE ON APPROACH INTO DENVER WITH PACKS SWITCHED TO APU. FLIGHT ATTENDANT SAW SMALL AMOUNT OF SMOKE ALONG FLOOR. ALSO, REPORTED OIL SMELL IN/NEAR LAVATORY. OPS CHECK GOOD ON GROUND. COULD NOT DUPLICATE. OK FOR SERVICE AT THIS TIME. (M)