As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OWNER REPORTED EXCESSVIE MAG DROP INTERMITTENTLY RIGHT ENG LEFT MAG. NOTICED EXCESSIVE CARBON DUST AROUND MAG VENT. PULLED MAG AND OPENED UP EVERYTHING COATED WITH CARBON DUST. SUBMITTER STATED BRUSH WORN TOO QUICKLY. MANUFACTURE BRUSH FROM HARDER SUBSTANCE.