As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DIRTY SOCK ODOR FROM COCKPIT TO AFT CABIN STARTED AFTER TAKEOFF AND FOR 40 MINUTES INTO FLIGHT. MAINTENANCE FOUND APU OIL COOLER LEAKING PER JOB CARD 26L00021001 AND REPLACED APU OIL COOLER AND PERFORMED SATISFACTORY OPERAITONAL CHECK PER JOB CARD 26L000049004.