As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)PILOT REPORTED HIGH MAG DROP DURING RUN-UP. MAGNETO WAS INSTALLED WITH THE WRONG GASKET RESULTING IN THE MAGNETO BEING LOOSE ON ITS MOUNT BASE AND CAUSING THE MAGNETO TO OPERATE OUT OF TIME. CORRECT GASKET SHOULD HAVE BEEN P/N 534750. N.B. THIS PROBLEM WAS ADDRESSED IN FEED-BACK MAGAZINE 1/95, PAGE 7.