What was found
AIRCRAFT GROUNDED. AN EMERGENCY WAS DECLARED & ACFT DIVERTED TO ATL DUE TO FLT CREW REPORTING THAT AT CRUISE, NR 1 IDG ABOUT 30 DEGREES HOTTER THAN NR 2 IDG. TEMP CONTINUED TO CLIMB. AT ABOUT 125 C, STARTED TO GET FUMES IN FLT DECK, ACFT LANDED SAFELY AT ATL WITHOUT FURTHER INCIDENT. MAINT FOUND NR 2 ENG IDG OIL OVERSERVICED. SERVICED IDG OIL TO PROPER LEVEL. A SATIS OPS CHK OF IDG WAS ACCOMPLISHED WITH NO ISSUES NOTED. MAINT ACCOMPLISHED SMOKE / ODOR/ FUME TROUBLESHOOTING TASK CARD 26L00021001 & FOUND NO LEAKS OR ODORS. A DECONTAMINATION OF THE ECS IAW TC 26L00021013 ACCOMPLISHED WITH NO ODORS OR ISSUES REPORTED.