As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE FOLLOWING CESSNA AIRCRAFTS, FOUND THE LOCK TABS FOR ENGINE MOUNT BOLTS TO BE EITHER MISSING, BROKEN, OR INCORRECT HARDWARE USED TO REPLACE THEM. C-205 IO470C-180 I0470C-182 IO470C-185 IO520C-206 IO550 WOULD LIKE TO NOTIFY ALL AIRCRAFT OWNERS THAT USE THESE BOLT LOCK TABS TO INSPECT THEM.