As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE THREE CRACKS WERE VISUALLY IDENTIFIED ON THE RIGHT HAND CLOSEOUT RIB (OEM P/N: 5122115-56). ALL CRACKS ARE LOCATED IN THE AREA OF FASTENERS COMMON TO THE FORWARD TRUNNION SUPPORT. THESE CRACKS ARE CONSISTENT WITH OTHERS THAT HAVE BEEN FOUND USING THE SAME INSPECTION METHOD. THIS RIB WILL BE REMOVED AND REPLACED.