As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA - FLT 2075 - AFTER TAKEOFF BNA WITH APU PLACARDED INOPERATIVE DUE TO OIL LOSS, SMOKE NOTED IN CABIN AND COCKPIT. AIRCRAFT RETURNED TO BNA AND LANDED WITHOUT INCIDENT. REPLACED ALL COALESCER BAGS AND ACCOMPLISHED GROUND ENGINE RUN AND PACK BURN-OUT PROCEDURE WITH NO SMOKE NOTED. AIRCRAFT RETURNED TO SERVICE AND APU SUBSEQUENTLY REPLACED AT ORD/29. (X)