What was found
INSIDE THE AIRCRAFT CABIN LT SIDE BS 478 - 492 (APPROX) PRESSURE FLOOR SILL SHOWS SIGNS OF CORROSION IN MULTIPLE AREAS. REMOVED CORROSION FROM CABIN LT SIDE PRESSURE FLOOR SILL AT BS 478 - 492 (APPROX) IAW SRM 51-21-06. MEASURED AREA ON PRESSURE FLOOR SILL ORIGINAL THICKNESS IS 0.055" MINIMUM REMAINING ON AREA IS 0.044" AREA FOUND TO BE ALLOWABLE LIMITS IAW REO 601R-53-41-3402 REV -. RESTORED SURFACE FINISH ON FLOOR SILL IAW REO 601R-53-41-3402 REV--, & SRM 51-21-16. CIC WILL BE APPLIED ON WORK CARD 2530/ CP 31823245, AIRCRAFT WEIGHT CHANGE NEGLIGIBLE.THRESHOLD INSPECTION (6398 FLIGHT CYCLES) DUE BEFORE OR AT 48015 FLIGHT CYCLES.