What was found
CLT FLT 979 SHORTLY AFTER DEPARTURE, THE CREW NOTICED AN ELECTRICAL ODOR FOLLOWED BY A EQUIPMENT OVERHEAT WARNING ON THE EICAS DISPLAY. THE FLIGHT RETURNED TO CLT AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE DID NOT FIND A DEFINITIVE SOURCE OF THE PROBLEM AND REPLACED THE NR 1 EQUIPMENT COOLING FAN, THE OVERBOARD EXHAUST VALVE, EQUIPMENT COOLING LOW FLOW SENSORS AND THE SMOKE DETECTOR. ALL PARTS WERE CHANGED AS A PRECAUTION.