As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NOTE THE SERIAL NUMBER ON THE ENGINE ON THIS FORM IS INCORRECT IT IS 217469-R. THE IMPULSE COUPLING SPRING WAS FOUND BROKEN. CUSTOMER HAD COMPLAINED OF ROUGH RUNNING CHECK MAG DROP, REMOVED MAGS AND INSPECTED. THE SPRINGS WERE BROKEN IN BOTH MAGNETOS,