As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE PERFORMING VISUAL INSPECTION CORROSION WAS NOTED BETWEEN STR. 29L & 29R AT BS 1010. CORROSION WAS BEYOND LIMITS, DAMAGE WAS REMOVED. FABRICATED FILLER, FABRICATED DOUBLER. INSTALLED REPAR IAW SRM 53-30-2, 53-30-3. NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE.