What was found
ORF - FLT 471 - EN ROUTE LGA-RIC, AT FL180, THE NR 1 ENGINE THRUST REVERSER DEPLOY LIGHT CAME ON WHILE ON DESCENT, FOLLOWED BY PRONOUNCED BUFFETING. THE NR 1 ENGINE SHUT DOWN AND AN EMERGENCY WAS DECLARED. THE FLIGHT DIVERTED TO ORF AND LANDED WITHOUT INCIDENT. TOTAL SINGLE ENGINE TIME WAS 8 MINUTES. MAINTENANCE REPLACED THE LEFT GROUND/FLIGHT SWITCH AND THE LEFT THRUST LEVER SWITCH BOX. ALSO, CHECKED WIRES RUNNING TO X2 AND K1265A AND K2905A, WITH NO DEFECTS NOTED. OPS CHECKS GOOD. (M)