What was found
DURING C-CHECK INSPECTION, DISCOVERED CORROSION ON THE LEFT CANTED BULKHEAD FUSELAGE SKIN AT STATION 1337, LONGERON 25L. REPAIRED BY TRIMMING OUT THE CORRODED OVERLAPPING SKIN, HFEC INSPECTING, FABRICATING AND INSTALLING REPAIR SKIN FILLER, EXTERNAL REPAIR DOUBLER WET WITH SEALANT. ACCOMPLISHED IAW EVERGREEN AIR CENTER, ENGINEERING CHANGE/REPAIR AUTHORIZATION NR N660HA-53-022-EAC. (M)