What was found
PBI - FLT 2990 - EN ROUTE FROM LGA TO PBI, APPROXIMATELY ONE HOUR INTO FLIGHT, THE FLIGHT ATTENDANT ADVISED THE CREW OF AN ELECTRICAL SMELL IN MID-CABIN. CREW COOLED DOWN CABIN AND SMELL DISSIPATED. FLIGHT ATTENDANT ADVISDED THAT ONLY A FAINT ODOR REMAINED. FLIGHT CONTINUED AND LANDED AT PBI WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. S/D - MAINTENANCE REMOVED AND REPLACED THE DUCT ASSEMBLY (P/N 65-54467-1) AND THE LEFT SIDE MIX CHAMBER DUCT ASSEMBLY IN THE AIR CONDITIONING DISTRIBUTION BAY. ALSO, REMOVED AND REPLACED BOTH THE LEFT AND RIGHT WATER SEPARATOR BAGS (P/N V121-1) PER MM. RAN BOTH PACKS AND LEAK CHECKED. NO LEAKS NOTED. (M)