As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH INTRODUCTION OF BLEED AIR FROM THE APU TO THE PACKS A FOUL DIRTY SOCKS ODOR WAS SMELLED. CORRECTIVE ACTION: FOUND OIL LEAKING FROM APU COOLING FAN. R & R APU COOLING FAN, IAW A319 AMM 49-52. OPERATIONS CHECKED GOOD, NO LEAKS NOTED.