As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING OPS CHECKS OF THE ENGINE AFTER ENGINE INSPECTION, IT WAS NOTED THAT THE FRONT ENGINE LT MAG HAD A DROP OF 250. THE MAGNETO WAS REMOVED AND DISASSEMBLED FOR INSPECTION. IT WAS THEN NOTICED THAT THE CLAMPS THAT BOTH OF THE CLAMPS THAT HOLD DOWN THE COIL, PN 10-50765, HAD BROKEN OFF. THE LOOSE PIECES INSIDE THE MAGNETO CAUSED DAMAGE TO THE HOUSING AND DISTRIBUTOR GEAR.