What was found
DURING C4/S1 CHECK, INSPECTION REPORTED CORROSION ON L2 DOOR SILL AT AFT INBD END AT NUT PLATE HOLES, APPROX 1-4 INCHES FWD OF FR 68. DETERMINED DAMAGE TO BE OUT OF LIMITS IAW SRM 53-41-14. REMOVED AND REPLACED L2 DOOR SILL IAW SRM 52-42-11.