As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IGNITION SWITCH FAILED TO SHUT-OFF MAGENTO DURING A PRE-FLIGHT MAGNETO CHECK AND FAILED AT 1201.1 HOURS SINCE NEW . THE REQUIRED DIODE ON THE STARTER SOLENOID WAS INSTALLED PER THE AD/SERVICE BULLETIN SO THIS SWITCH SHOULD NOT HAVE FAILED AT 1201.1 HOURS.