What was found
MAIN CABIN FLOOR SUPPORT STRUCTURE, UPPER SURFACE IS CORRODED AT FRAME 30, LOCATION AT APPROXIMATELY -Y 2425.7. REMOVED DAMAGE IAW SRM 51-73-10 AND FOUND TO BE OUT OF LIMITS IAW SRM 53-10-16, WITH A MAX MATERIAL REMOVED OF .024". REPAIRED SEAT TRACK IAW SRM 53-10-16, REPAIR 4.