What was found
FLT 6503 - LGA-IAD - DURING CRUISE, MADE AN EMERGENCY DESCENT INTO LNS DUE TO SMOKE IN COCKPIT. AIRCRAFT WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND OPENED DMI 46994, MEL 33-1 ON CONSOLE LIGHT. MAINTENANCE CLOSED DMI 46994 ON 2-4-99 BY REMOVING AND REPLACING CONSOLE LIGHT, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)