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 AFTER APU BLEED TURNED ON-DIRTY SOCK SMELL FILLED AIRCRAFT. MAINTENANCE TROUBLESHOT TO COOLER INLET OIL LINE AT FWD CONNECTION IAW AMM 49-00 -00-790-003-A. MAINTENANCE PERFORMED JOB CARD 26L00021002 APU SMOKE ODOR FUMES TROUBLESHOOTING. APU OIL COOLER PRESSURE AND RETURN LINE O-RINGS REPLACED ALONG WITH APU WASH.