What was found
EN ROUTE A BAD ODOR WAS REPORTED IN AFT CABIN, DIRTY SOCKS. TRIED TO ISOLATE WITH SHUTTING OFF PACK 2. ODOR WENT AWAY BUT RETURNED WHILE PACK REMAINED OFF. DIVERTED & LANDED WITHOUT INCIDENT. FOUND OIL RESIDUE INSIDE OF FAN SPINNER OF NR 2 ENG FRONT CONE. INSTALLED SERVICEABLE SEALS ON LPT SHAFT IAW 72-55-00-960-002A. ACCOMPLISHED GND RUNS, NO LEAKS NOTED. FRONT SPINNER CONE DRY AFTER ENG RUN. ACCOMPLISHED JOB CARDS 26L00021004, 26L00021002, 26L00021001 & 26L00021005.