What was found
LAX - AIR TURN BACK - FLT 0081 - ON CLIMB OUT OF LAX EN ROUTE FOR PHX, FLIGHT ATTENDANT REPORTED AN ELECTRICAL BURNING ODOR AT MID CABIN. TURNED OFF GALLEY POWER, NO HELP; DECLARED AN EMERGENCY AND RETURN TO LAX. PILOT ALSO OBSERVED A HOT WAX ODOR IN FLIGHT THAT WAS ISOLATED TO THE NO. 2 AIR CONDITIONING PACK. MAINTENANCE INSPECTED MID CABIN AREA OVERHEAD POWER SUPPLY UNITS, NO ELECTRICAL ODOR WAS DETECTED. RAN BOTH AIR CONDITIONING PACKS TO FULL HOT AND COLD, NO ODORS NOTED. PRIOR TO THIS FLIGHT NUMEROUS SEALS WERE REPLACED ON BOTH AIR CONDITIONING PACKS, SUSPECT WAX FROM SEALS MAY HAVE PRODUCED BURNING ODOR.