As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CONDUCTING A TAIL ROTOR BALANCE SESSION, BALANCE CHANGED. VISUAL INSPECTION OF THE TAIL ROTOR HEAD SHOWED AN VERNIER BRACKET HAD FALLEN OFF. VISUAL INSPECTION OF THE AREA SHOWED NO OTHER DAMAGE. TAIL ROTOR BALANCED TO WITHIN LIMITS.