As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: CORROSION ON PASSENGER CABIN AFT ENTRY FLOOR SUPPORT INTERCOSTAL LOCATED BETWEEN BS 947 AND BS 962, AT LBL 25. REPLACED INTERCOSTAL PER SRM 53-70-51.**SUPPLEMENTAL REPORT FOR AALA202209296528: ENGINEERING REVIEWED THIS EVENT AND DETERMINED THE CORRECT LEVEL WAS LEVEL 2 NOT LEVEL 1. SECTION 7 CORROSION LEVEL FIELD WAS CORRECTED ACCORDINGLY**