As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE PROCESS OF LOOSENING M/R WEIGHT BOLT FOR ROUTINE M/R TRACK AND BALANCE, HUB BALANCE BRACKET BROKE IN TWO PIECES. BREAK WAS IN AREA OF 90 DEGREE BEND APPROX. 10% OF FRACTURE AREA APPEARS TO BE A FRESH BREAK. INSPECTED M/R WEIGHT STICK-UPAND FOUND TO BE INSTALLED PROPERLY.