What was found
DURING ROUTINE C-CHECK FOUND EXTERNAL FUSELAGE SKIN CORRODED FROM STATION 660 TO STATION 662 AT LONGERON 33 LEFT. REMOVED DAMAGED SKIN. FABRICATED FILLER, DOUBLER, AND TRIPLER. LOCATED DRILLED TRIMMED TREATED, PRIMED, AND INSTALLED REPAIR PARTS AND NEW FASTENERS IAW COOPESA EO COO-8-53-410-04.