As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MBV INSPECTION, QA FOUND A CRACK ON THE LT WING RIB 5. ACFT WAS REMOVED FROM SERVICE FOR MBV INSPECTION & WILL BE RETURNED TO SERVICE AFTER MBV INSPECTION. R & R LT WING RIB 5 IAW ERS-EM-57MR-592. REPAIR MATERIALS, RIB 5 PN 145-67083-601.