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 -Y465 FR 66 STR 23R; REMOVED CORROSION 1.262" L X 1.238" W X .031" D FROM ORIG THICKNESS OF .163" FOUND TO BE OUT OF LIMTS PER SRM. REMOVED AND REPLACED FLOOR SUPPORT AT -Y465 FR 66 STR 23R IAW A320 SRM 53-00-14-283-002 AND SRM 51-72-11.