As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SLICK BY CHAMPION SB2-19A MANDATORY INSPECTION OF IMPULSE COUPLING. THE SB HAS YOU INSPECT THE IMPULSE COUPLING PER THE MAINTENANCE MANUAL. IF ANY MOVEMENT IS FOUND IN THE RIVETS, THE IMPULSE COUPLING MUST BE REJECTED. LEFT ENGINE RH POSITION S/N 17090482 MAGNETO INSTALLED WITH TSN 0.0 AT AN AIRCRAFT TOTAL TIME 11522.3 AND ENGINE TSN/TSO 7211.1/319.1 INSPECTED MAGNETO MODEL NO. 4372 S/N: 17090482 TSN: 319.1 INSTALLED IN THE LEFT ENGINE RH POSITION AND FOUND BOTH RIVETS LOOSE. THIS IMPULSE COUPLING FAILED THE INSPECTION AND IS NO LONGER SERVICEABLE.