As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T2334/9SEPT SMOKE ENTERED CABIN JUST AFTER TAKEOFF ROLL LIFT OFF. SMOKE WAS GREENISH IN COLOR AND LASTED ABOUT FIVE MINUTES AND THEN BEGAN TO DISSIPATE. LANDED AT DFW WITHOUT INCIDENT. FOUND OIL IN APU. REPLACED APU IN ACCORDANCE WITH WORK CARD 21 96 01. SYSTEM GROUND CHECKED NORMAL OPERATION.