What was found
DURING A ROUTINE C CHECK INSPECTION, FOUND RT STUB WING NR 4 STRUCTURE RIB WEAR DAMAGE AT STA XS 520.000. REPAIR ACCOMPLISHED, REMOVED WORN RIB. FABRICATED RIB AND PERFORMED HEAT TREATMENT. PERFORMED NDT INSPECTION. CLEANED, TREATED AND PRIMED. INSTALLED NEW RIB ON RT WING NR 4 STUB WING PER DOUGLAS STRUCTURAL REPAIR MANUAL, REPAIR SPECIFICTION NR 2003-05, AND DRAWING NR 9753797.