What was found
FLIGHT INSTRUMENT INSTALLATION. DISPLAY ROTOR BRAKE WARNING BMS FAULT 13. RECEIVED THE WARNING TWICE. REPLACED WITH USED UNIT, CORRECTED PROBLEM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLIGHT INSTRUMENT INSTALLATION. DISPLAY ROTOR BRAKE WARNING BMS FAULT 13. RECEIVED THE WARNING TWICE. REPLACED WITH USED UNIT, CORRECTED PROBLEM.