As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE AIRCRAFT RETURN TO ORIGIN DUE TO AN OIL SMOKE ODOR IN THE CABIN AT 2000 FT WITH THE APU OFF. UPON TAKEOFF, THE CABIN AND COCKPIT FILLED WITH SMOKE. TECH WORKED ON THE RT ENGINE THE DAY BEFORE THIS EVENT FOR A LEAKING HYDRAULIC PAD AGB SEAL. TROUBLESHOOTING IS ONGOING.