What was found
SHORTLY AFTER TAKEOFF, CREW NOTICED INSTRUMENTS AND RADIOS FLICKERING, FOLLOWED BY TOTAL ELECTRICAL FAILURE. CREW RETURNED AND LANDED WITHOUT INCIDENT. MECH FOUND RT START RELAY FAILED IN CLOSED POSITION, PERMANENTLY ENGAGING THE STARTER. MECH REMOVED AND REPLACED SART RELAY, STARTER, AND AS PRECAUTIONARY MEASURE, REMOVED AND REPLACED BATTERY AND BATTERY RELAY. AC RETURNED TO SERVICE.