What was found
CABIN FLOORBEAM FOUND CORRODED AT STA 460 X= 48 TO X =53. REMOVED IAW SRM 51-31-01, REV 48 AND INSTALLED NEW FLOORBEAM IAW AMM 20-50-02, REV 70.2. NEW FLOORBEAM REPLACED IAW DWG ACA7364-1. REPAIR CLASSIFIED AS MAJOR IAW GMM 6-2-100, REV 114