What was found
BRUSHES WORN TOTALLY OUT, ALLOWING SPRINGS AND WIRES TO DAMAGE ROTOR SLIP RINGS. POOR QUALITY BRUSHES NOT TO LAST LONGER.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
BRUSHES WORN TOTALLY OUT, ALLOWING SPRINGS AND WIRES TO DAMAGE ROTOR SLIP RINGS. POOR QUALITY BRUSHES NOT TO LAST LONGER.