What was found
AT C CHECK, LEFT HORIZONTAL STAB L/E UPPER AREA AT STA XFS 172.5, FOUND CORROSION UNDER SKIN SURFACE. CUT OUT DAMAGED AREA FABRICATED FILLERS AND REPAIR DOUBLER PER EO 18R5511079. INSTALLED FILLER S AND DOUBLER PER EO FILLER 4 BY 2 AND 1 BY 1, DOUBLER 5.75 BY 33. N/R 422