As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 400 FLIGHT CYCLE CHECK, A CRACKED RIVET HEAD WAS DISCOVERED ON THE RIGHT SIDE OF AIRCRAFT FUSELAGE ALONG FRAME 9. UPON FURTHER INVESTIGATION, THE SKIN SUPPORT BRACKET IN WHICH SAID RIVET PASSES THROUGH WAS CRACKED. THE SUPPORT BRACKET WAS REMOVED AND A SERVICEABLE BRACKET WAS INSTALLED. WORK WAS DONE IN ACCORDANCE WITH AERODESIGN REPORT 660-1, IR DATED 2-16-93.