As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) WING ATTACHMENT BOLT CRACKED. FURTHER INVESTIGATION FOUND THATTHE WASHER HAD BEEN INCORRECTLY FITTED WITH THE WASHER BEVELLED EDGE FACING AWAY FROM THE BOLT HEAD. THE WASHER WAS ALSO DAMAGED. FOUND DURING INSPECTION IAW AD/BEECH55/79 AMDT1.PERSONNEL/MAINTENANCE ERROR.