As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL INJECTOR REMOVED FOR EXCESSIVE RICHNESS IAW MFG CHECKLIST, THE MAG CHECK IS DONE AT 2200 RPM. THE MIXTURE IS LEANED TO PEAK RPM THEN ADJUSTED TO 2200 RPM. THE PEAK IS NORMALLY 40-50 RPM. THIS WAS IN EXCESS OF 200 RPM. AT O/H THE REPAIR STATION REPORTED RICHNESS.