As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER REMOVING GYRO FROM THE AIRCRAFT, A RATTLING NOISE WAS HEARD INSIDE THE GYRO HOUSING. THE UNIT WAS DISASSEMBLED AND INSPECTED. A SMALL BRASS KNURLED NUT (TOOL?) WAS FOUND INSIDE. THERE WAS IMPACT DAMAGE IN THE SPINNING PORTION OF THE GYRO.