As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE A CRACK WAS DISCOVERED ON THE LEFT HAND CLOSEOUT RIB LOCATED AT LEFT WING STATION 106.79. THIS CRACK STARTS AT A HOLE IN THE FORWARD ROW OF FASTENERS COMMON TO THE AFT TRUNION SUPPORT AND EXTENDS FORWARD APPROXIMATELY .900 IN. THIS RIB WILL BE REPLACED USING NEW PARTS.