As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 0953940) CORROSION OUT OF LIMITS ON FLOOR BEAM BTW STA312 AND LBL21-LBL23 UPPER/AFT CHORD. FLOOR BEAM BTW STA 312 AND LBL21-LBL23 UPPER/AFT CHORD WAS REPAIRED PERMANENTLY CATEGORY A PER B737-800 SRM 53-10-51-2R PROCEDURE 15, REPAIR 15.