As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPEAR TO HAVE SMOKE COMING FROM PACK ON TAKEOFF. TURNED PACKS OFF, SMOKE STOPPED. RETURNED FOR LANDING. DRAIN ALL THE ENGINE OIL AND RE-SERVICE TO A KNOWN QUANTITY. AFTER IDLE RUN THE ENGINES SERVICED OIL AS NEEDED. AFTER SEVERAL CYCLES OF IDLE, CRUISE POWER, AND FULL POWER PER THE JRH. NO DEFECTS NOTED.