What was found
DURING ROUTINE C CHECK, FOUND LEFT WING UPPER TRAILING EDGE PANEL AFT OF TRUNNION PANEL CHAFED ON INBOARD UPPER SKIN. REMOVED DAMAGED AREA, FABRICATED REPAIR DOUBLER, LOCATED, DRILLED, TRIMMED, TREATED, PRIMED, AND INSTALLED DOUBLER. IAW 57-2-0, 57-2-1, 57-3-1, 51-1-22, 57-2-21 AND 51-1-8.