As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT SAW SPARKS REFLECTED IN COCKPIT AND SMELLED EVIDENCE OF SPARKING SHORTLY AFTER TAKING OFF FROM HOSPITAL HELIPAD. IMMEDIATELY RETURNED TO HELIPAD, SHUTDOWN AND OFF LOADED PATIENT. MECHANIC FOUND FRAYED PORTION ON TERMINAL END OF WIRE IN CONSOLE CIRCUIT BREAKER PANEL. MECHANIC REPLACED TERMINAL END AND SECURED WIRE.