As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS AIRCRAFT HAS DIRTY SOCK SMELL. MAINTENANCE FOUND THE APU TURBINE CAVITY VENT LEAKING OIL AT THE O-RINGS. REMOVED AND REPLACED APU TURBINE CAVITY VENT, PACKINGS IAW AMM 49-91-53. OPS CHECK GOOD. NO LEAKS.