As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT RECEIVED A SYS 2 DEGRADE CAUTION LIGHT ILLUMINATION DURING FLIGHT WITH A PATIENT ON BOARD. IMMEDIATELY ABORTED THE FLIGHT & RETURNED TO THE HOSPITAL FOR LANDING AS THE EMER PROCEDURE WAS LAND AS SOON AS PRACTICAL. THE MECHANIC ARRIVED TO TROUBLESHOOT THE DISCREPANCY, BUT COULD NOT DUPLICATE THE PROBLEM. AFTER CLEANING ALL OF THE ELEC CONNECTORS FOR THE EECU, THE ACFT WAS RETURNED TO SERVICE.