As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING A LEFT MAGNETO FOR NO SPARK, FOUND IGNITION SWITCH (TCM PN 10-357290-1, SN H16H) SHOWED INTERMITTENT OPEN CONTACT WITH KEY IN OFF AND RIGHT POSITION WITH SLIGHT ROTARY MOVEMENT OR VERTICAL MOVEMENT. BOTH POSITIONS SHOULD INDICATE CONSTANT GROUND. RIGHT MAG CIRCUIT HAD NO ISSUES AND CHECKED CORRECT IN OFF AND LEFT. IGNITION SWITCH WAS INSTALLED NEW ON 03-12-02017 AT 3152.94 HOURS TACH. SEE RELATED SUBMISSION CONTROL NUMBER 2020FA0000416.