As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O FLT ATTENDANT REPORTED SMOKE IN THE CABIN AND LAVATORY SMOKE DETECTORS GOING OFF, ATB BACK TO JAX. FOUND APU INLET CONTAMINATED WITH APU OIL. PERFORMED OPN 5088 AND OPN 5089 DUCT BURNOUT. OIL LEAK FROM APU LOW OIL PRESSURE SWITCH BODY. DEACTVATED APU AND FORWARD TO MCO AND PLACARD.