As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE C/W WING BOLT REPLACEMENT AND WING INSPECTION, FOUND LOWER AFT WING FITTINGS ON BOTH WINGS WITH COMPRESSION MARKS. BEECHCRAFT FIELD SERVICE CONTACTED PER MM INSTRUCTIONS. SPECIAL TOOLING AVAILABLE TO RESURFACE FITTING FACE. SUBMITTER SUGGESTED OWNERS CONFORM TO WING BOLT INSPECTION/REPLACEMENT PER MM INTERVALS.