What was found
FLT#276, SJU-BDL. (AIRCRAFT PERFORMED AN AIR TURN BACK TO SJU) ' PASSING 9'000 FEET FAS REPORTED BURNING RUBBER SMELL THEY REPORTED THE SMELL STARTED AFTER T/O FUMES CHECKLIST COMPLETED SMELL D15 REDUCED SMELL NOTICED FROM ROW 3 FWD; PERFORMED FIM 05-50-00-810-831 ODOR IDENTIFIED AS A LEVEL A TYPE 10 COMPLIED WITH INFO NOTICE 2017-T015 SECTION A ISOLATED FAULT TO TYPE 10(A) PER TSM 05-50-00-810-085 B/TSM 05-50-00-810-085 D. AIRCRAFT IS OK FOR SERVICE.'