As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C 4 CHECK IN OSCODA MICHIGAN (OSC), KALITTA MAINTENANCE FOUND AFT LWR CARGO COMPARTMENT HAS EVIDENCE OF CORROSION AT STRINGER 39R AT STA 1307. GB5.FOUND TO BE OUT OF LIMITS REMOVED AND REPLACED AFT LWR CARGO STR39R AT FACTORY SPLICE STA 1219 TO FACTORY SPLICE STA 1307 IAW B767-300 SRM 51-40-02.