What was found
WHILE AIRCRAFT WAS IN FOR HEAVY MAINTENANCE VISIT, MAINTENENCE FOUND CORROSION ON PAX FLOOR STRUCTURE AT FR 16 LBL 13-14. BLENDED AND FOUND TO BE OUT OF LIMITS PER SRM 51-10-03 AMD 53-10-10. REMOVED AND REPLACED DOUBLER IAW SRM 51-42-02, AND 51-40-03.