What was found
LGA - FLT 1290 - ON APPROACH TO LGA, DESCENDING THROUGH FL 180, CREW SMELLED A STRONG ELECTRICAL ODOR IN THE FLIGHT COMPARTMENT. CAPTAIN DECLARED AN EMERGENCY. FLIGHT LANDED WITHOUT INCIDENT AND TAXIED TO THE GATE. IT WAS NOTED THAT THE NR 2 GENERATOR CONTROL BREAKER WAS TRIPPED. MAINTENANCE FOUND THE NR 2 GENERATOR CONTROL UNIT WITH BURNED COMPONENTS. REMOVED AND REPLACED THE NR 2 GENERATOR CONTROL UNIT. RESET BREAKER AND RAN ENGINES. ACCOMPLISHED OPERATIONAL CHECK PER MM 24-21-81. OPERATIONAL CHECK GOOD. (M)