What was found
PILOT NOTICED ENGINE WAS RUNNING ROUGH. AN EMERGENCY LANDING WAS MADE WITHOUT INCIDENT. MAGNETO REMOVED, BENCH CHECKED, AND REPLACED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT NOTICED ENGINE WAS RUNNING ROUGH. AN EMERGENCY LANDING WAS MADE WITHOUT INCIDENT. MAGNETO REMOVED, BENCH CHECKED, AND REPLACED.