As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT FLIGHT ATTENDANT REPORTED SMOKE IN THE CABIN. RECEIVED LAV SMOKE INDICATION ON EICAS. RAN BOTH ENGINES WITH BOTH PACKS ON TO BURN OUT RESIDUAL OIL FROM BLEED DUCTS. RESIDUAL OIL IN DUCTS WAS FROM THE ENGINE THAT WAS PREVIOUSLY MOUNTED ON THE LT SIDE. AC RETURNED TO SERVICE. (K)