As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT RETURNED TO AIRPORT AFTER LOSS OF AC POWER DUE TO INADVERTENTLY BUMPING THE INVERTER SWITCH TO THE OFF POSITION. MAINTENANCE CHECKED THE INVERTER SWITCH AND INVERTERS AND NO FAULT WAS FOUND. IT IS RECOMMENDED THAT THE 3 POSITION TOGGLE SWITCH BE REPLACED WITH THE 3 POSITION LEVER LOCK TYPE SWITCH THAT IS USED IN THE LATER MODEL B200 AIRCRAFT.