As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GROUND POWER CHECKS FOUND AIRCRAFT TO HAVE A LATERAL VIBRATION. INSPECTED Z-ARIS MOUNTS AND FOUND THE RT REAR Z-ARIS MOUNT OUT OF LIMITS. REMOVED AND REPLACED THE RT REAR Z-ARIS MOUNT. PERFORMED MAIN ROTOR TRACK AND BALANCE. NO FURTHER DEFECTS NOTED.