What was found
LT WING, CRACK FOUND ON NR 16 SLAT TRACK INBOARD SUPPORT RIB. REMOVED CRACKED SUPPORT RIB AS PER SRM 51-31-01, VOL.II AND FABICATED NEW SUPPORT RIB AS PER DRAWING ARB2850 AND ARB2873. INSTALLED FABRICATED RIB AT LT WING ON NR 16 SLAT TRACK INBOARD AS PER SRM 51-33-01, VOL.II AND DRAWING ARB2873. COMPLIED WITH EA 1-5750-74325, WINGS - LT SLAT - FABRICATION OF RIB FOR NR 16 SLAT TRACK.