What was found
DURING ROUTINE C-CHECK FOUND EXTERNAL FUSELAGE SKIN CORRODED AT STATION 680, LONGERON 33 LEFT AND 34 LEFT. REMOVED DAMAGE, FABRICATED REPAIR PARTS. LOCATED, DRILLED, TREATED, PRIMED, AND INSTALLED REPAIR PARTS AT STATION 674 TO STATION 696 BETWEEN LONGERON 31 RIGHT AND 34 RIGHT IAW COOPESA EO COO-8-53-385-04.