As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE RUNNING ROUGH ON TAXI. CAM FOLLOWER OF POINTS ASSEMBLY FOUND BROKEN. THIS IS THE SECOND SET OF POINTS TO FAIL WITH THE SAME CONDITION, IN THE SAME MAGNETO, WITHIN 100 HOURS OF OPERATION. CLOSER INSPECTION FOR PROBABLE CAUSE FOUND NOTCHES IN THE CAM, P/N 10-88543-1. THE CAM AND POINTS WERE REPLACED.