As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MAGNETO WAS ONLY FIRING ON 3 OF THE 6 CYLINDERS. THE AIRCRAFT IS EQUIPPED WITH A G3I ELECTRONIC IGNITION SYSTEM THAT IS COUPLED TO THE MAGNETOS. THE LEFT MAGNETO IS THE TRIGGER FOR THE COMPLETE SYSTEM, IF THE LEFT MAGNETO FAILS OR DETERIORATES, THEN THE COMPLETE IGNITION IS COMPROMISED.