As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING INTERNAL BORESCOPE INSPECTION (SNRM #N00776), LEFT HAND WING #7 SLAT INTERNAL RIB FOUND CRACK AT XOS 963.009. CRACK RIB REMOVED AS PER SRM 51-31-01-OG AND FABRICATED RIB PER DOUGLAS DRAWING ARB1877 RIVISION C. INSTALLED FABRICATED RIB AT LEFT HAND WING #7 SLAT INTERNAL AT XOS 963.009 AS PER SRM 51-35-01-OG. REPAIR CLASSIFIED AS MAJOR PER GMM 6-2-100.