As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE INSPECTION OF THE VIBRATION ASORBER ASSEMBLY, THE ADDITIONAL WEIGHT WAS FOUND TO HAVE COME LOOSE. THIS CAUSED SEVERE DAMAGE TO THE WEIGHT ASSEMBLY, ADDITIONAL WEIGHT, BOLT AND PIN. THE PROBABLE CAUSE OF THE LOSS OF TORQUE ON THE ATTACHING HARDWARE IS THOUGHT TO BE EITHER LOW INITIAL TORQUE OR IMPROPER BENDING OF THE LOCKING TABS. POSSIBLY THE SOFT NATURE OF THE LEAD WEIGHT MATERIAL CONTRIBUTED TO THE LOSS OF TORQUE.