What was found
ON HEAVY MX, FOUND CORROSION AT AFT PAX CABIN LOWER L2 SILL BEAM LOCATED AT FRAMES 66 & 68 AT STRINGER 23L. REMOVED CORROSION IAW SRM 51-74-00. REMOVED FASTENERS AT AFFECTED AREAS IAW SRM 51-42-11. PERFORM DVI AND ULTRASONIC INSPECTIONS. PERFORMED CUTOUT AS APPLICABLE. BLENDED AREAS, TRIMMED EDGES TO CONFIRM NO CRACKS. DRILLED NEW HOLES, FINAL REPAIR COMPLETED IAW E/C A13-593-01.