What was found
AIRCRAFT DUE C7-S2 INSPECTION. MAIN CABIN FLOORBEAM TRACK AT FRAME 20 Y-765 HAS CORROSION. BLENDED CORROSION ON FLOORBEAM, FOUND TO BE 50% MATERIAL LOSS OUT OF LIMITS. R & R FLOORBEAM TRACK IN MAIN CABIN AT FRAME 20 Y-765 IAW SRM 51-42-11, PAR 5 A-C, PAR 7 B. ACFT DUE OUT OF C CHECK 11/1/2014.