As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND LH INBOARD DOUBLER IS CORRODED AT FR 16. REMOVED DAMAGED LH INBOARD FLOOR DOUBLER FROM FRAME 13-16. LOCATED, DRILLED AND INSTALLED LH INBOARD FLOOR DOUBLER AT FRAME 13-16 REF:EMB SRM 51-40-08. A/C REMAINS IN CHECK.