What was found
MED CREW NOTED BURNING ELECTRICAL ODOR ORIGINATED FROM AFT CABIN AREA ON APPROACH. MECHANIC INSPECTED A/C ELECTRICAL SYSTEM WIRING, PERFORMED ELECTRICAL TEST OF MASTER ELECTRICAL BOXES. GROUND RUN, FLEW ACFT COULD NOT DUPLICATE ODOR IN CABIN, ALL SYSTEMS APPEAR TO BE WORKING NORMALLY. ACFT RETURNED TO SERVICE.