As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 1604 - DURING APPROACH, THE CREW NOTICED THE SMELL OF OIL APPARENTLY COMING FROM THE AIR CONDITION SYSTEM. THE SMELL BECAME MORE INTENSE AFTER LANDING. MAINTENANCE FOUND THE APU DROPPING OIL FROM THE INTERNAL CORE. THE APU WAS MEL'D AND SCHEDULED FOR REPLACEMENT. (M)