What was found
NR 2 ENGINE HAD SMOKE EMITTING FROM EXAUST PIPE AFTER SHUTDOWN. CREW HAD NO EICAS MESSAGES OR INDICATIONS THE ENGINE WAS NOT SHUT DOWN. RAMP STATED IT SOUNDED LIKE THE ENGINE TRIED TO LIGHT OFF WHILE IT WAS SMOKING. RT SPAR FUEL VALVE MESSAGE APPEARED AFTER ACFT WAS AT GATE. OPENED NACELLE, NO EVIDENCE OF LEAKS. INSTALLED NEW RT ENGINE FUEL CUTOUT SWITCH, AND CONNECTOR. SECURED CLAMP AND HARNESS. CHECKED WIRE TO RT CUTOUT SWITCH PER WD 76-21-12. CHECKED OK. REPLACED ERU PER MM. OPS CHECKED GOOD.