What was found
SYR/BTV -CO3551, CREW REPORTED STRONG ELECTRICAL SMELL IN COCKPIT, THEN DISSIPATED. MAINTENANCE DISPATCHED TO SYR, RAN ENGINES AT ALL POWER SETTINGS, CYCLED PACKS AND SMELL DISSIPATED. COULD NOT DUPLICATE PROBLEM. AIRCRAFT RELEASED FOR SERVICE. DURING LINE CHECK IN BTV A STRONG ELECTRICAL BURNING SMELL WAS NOTED IN AFT CABIN AREA. BTV MAINTENANCE FOUND, REMOVED AND REPLACED BURNT LATERAL LIGHT SOCKET AT SEAT 9D IAW ATR42 STANDARD PRACTICES. OPS CHECKED SYSTEM GOOD. AIRCRAFT RELEASED FOR SERVICE.