As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTROSYSTEMS DISTRIBUTOR BLOCK FAILED ON TAKEOFF ROLL APPROXIMATELY 10 HOURS AFTER INSTALLATION. IT APPEARS THAT THE OIL LIGHT BEARING THAT THE ROTOR SHAFT RIDES IN WAS NOT PROPERLY OIL BEFORE INSTALLATION. THE PART WAS INSTALLED IN THE LEFT MAGNETO ON THE LEFT ENGINE.