As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION ON FLOOR SUPPORT Y512 FR 66 STR 23L; REMOVED CORROSION 1.704" L X 2.383" W X .042" D FROM ORIG THICKNESS OF .163" FOUND TO BE OUT OF LIMTS PER SRM. REMOVED AND REPLACED FLOOR SUPPORT AT Y512 FR 66 STR 23L IAW A320 SRM 53-00-14-283-002 AND SRM 51-72-11.