What was found
WHILE PERFORMING INTERNAL BORESCOPE INSPECTION (SPECIAL/NON ROUTINE MAINTENANCE FORM NUMBER N00777), LEFT HAND WING NUMBER 8 SLAT INTERNAL RIB FOUND CRACK AT STATION XOS 1141.220. CRACKED RIB REMOVED AS PER SRM 51-31-01-0G AND FABRICATED RIB PER DOUGLAS DRAWING ARB1954 REVISION NC. INSTALLED FABRICATED RIB AT LEFT HAND WING NUMBER 8 SLAT INTERNAL AT STATION XOS 1141.220 AS PER SRM 51-35-01-0G. REPAIR CLASSIFIED AS MAJOR AS PER GMM 6-2-100.