What was found
AT FL270 ENGINE NR 3 START VALVE ILLUMINATED. ACCOMPLISHED SUPPLEMENTAL PROCEDURES. SHUT DOWN NR 3 ENGINE. ACCOMPLISHED ABNORMAL ENGINE SHUTDOWN CHECKLIST ON GENERATOR INOP CHECKLIST AND ONE ENGINE INOP LANDING CHECKLIST AND WINDMILLED ENGINE SUPPLEMENTAL PROCEDURE. NO FUEL DUMP REQUIRED. WINDMILLING TIME 30 MINS AND OIL PRESSURE NEVER WENT BELOW 15 PSI. MAINTENANCE REPLACED NR 3 STARTER VALVE AND PRESSURE SWITCH AND PERFORMED A GOOD OPERATIONAL CHECK PER THE AMM.