What was found
DURING CRUISE THE FLIGHT CREW REPORTED SMOKE IN THE COCKPIT. EMERGENCY WAS DECLARED FLIGHT. FLIGHT WAS DIVERTED TO RIC. FLIGHT LANDED UNEVENTFULLY AND PASSENGERS DEPLANED NORMALLY. MAINTENANCE PERSONNEL PERFORMED OPS CHECK LT PACK FOUND LT ENVIRONMENTAL CONTROL UNIT BAD UNIT WAS REMOVED AND REPLACED A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED. AIRCRAFT WAS RELEASED FOR CONTINUED SERVICE