As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SMOKE IN CABIN ON TAKEOFF AND AT CLIMB ALTITUDE. AIRCRAFT TURNED AROUND AND LANDED SAFELY WITHOUT INCIDENT. OIL RESIDUE WAS FOUND IN THE WATER SEPARATOR SYSTEM. NR 1/3 CARBON SEALS WERE PREVIOUSLY CHANGED PRIOR TO THIS FLIGHT ON BOTH ENGINES. ALL DUCTS CLEANED AND GROUND RUN.