As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3029 2L FA ADVISED US OF THE FUMES SMELL UPON REACHING GATE. IT STARTED ON SHORT FINAL BURNING RUBBER SMELL. CORRECTIVE ACTION: T/S SOURCE OF FUME TO APU. USING BLACK LIGHT FOUND OIL LEAK FROM APU COMPRESSOR AND LEAKING DOWN INTO INLET. PERFORMED DECONTAMINATION PER A321 AMM 21-00-00-615-804-A AND A321 AMM 36-10-00-615-802A. RECIRC FILTERS REPLACED PER A321 AMM 21-21 (7253562)