What was found
CLT - FLT 828 - EN ROUTE FROM IAH-CLT, CAPTAIN REPORTED A STRONG ELECTRICAL ODOR IN THE MID CABIN. FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE 'CABIN SERVICE LT O/H LIGHTING' CIRCUIT BREAKER POPPED. CIRCUIT BREAKER WOULD NOT RESET. SUSPECT OVERHEAD LIGHTING BALLAST SHORTED. RELEASED AIRCRAFT ON MEL 33-2. MAINTENANCE REMOVED AND REPLACED THE OVERHEAD LIGHTING BALLAST AT SET ROW 20, LEFT SIDE. OPERATIONAL CHECK GOOD. CLEARED MEL 33-2. (M)