As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF, THE CREW REPORTED OIL ODOR AND THEN SMOKE IN THE CABIN. THEY REDUCED POWER AND THE SMOKE CLEARED. THE FLIGHT RETURNED TO THE DEPARTURE POINT WHERE AN UNEVENTFUL LANDING WAS MADE. THIS IS THE SECOND SUCH EVENT ON THIS ACFT, 1ST EVENT REPORTED ON 23 APRIL. TROUBLESHOOTING IS ON-GOING.