As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIBS ON THE LEFT WING, ONE STRINGER AFT OF THE LEADING EDGE AT WS 56.50, WS 65.50, AND WS 85.00 ARE CRACKED WHERE THE STRINGER AND RIB ATTACH. THE CRACKS GO FROM THE RIVET HOLE FORWARD TO THE LEADING EDGE OF RIB SECTION. SUSPECT CRACKS ARE DUE TO THE FLEXING OF THE WING OVER TIME. REPAIRED BY INSTALLATION OF A DOUBLER.