What was found
MAJOR REPAIR - DURING C-09 CHECK EXFOLIATION CORROSION WAS FOUND ON CABIN FLOORBEAM AT RIGHT INBOARD EDGE OF CUSP, BS 1681. MAINTENANCE REMOVED CUSP ATTACH ANGLE FROM RIGHT CUSP AREA BS 1640 TO BS 1720, THRESHOLD WEB AND SUPPORT STRUCTURE, INTERCOSTALS FROM BS 1680 TO BS 1700, AND CORRODED CABIN FLOORBEAM BS 1681, FABRICATED A NEW REPLACEMENT CABIN FLOORBEAM; AND INSTALLED REPAIR PART, REMOVED CUSP ATTACH ANGLE, THRESHOLD WEB AND SUPPORT STRUCTURE, AND INTERCOSTALS IAW SRM.