What was found
DURING C-CHECK INSPECTION DISCOVERED EXFOLIATION CORROSION ON THE LOWER FUSELAGE EXTERNAL SKIN AT BS 642, LONGERON 30, BL 0. THE CORRODED AREA MEASURED 5.25 INCH IN LENGTH AND 4.9 INCH IN WIDTH. AFFECTED AREA WS TRIMMED TO REMOVE CORROSION. INSTALLED INTERNAL FINGER DOUBLERS AND EXTERNAL REPAIR DOUBLERS WET WITH SEALANT AND TOP COATED AS REQUIRED. ACCOMP IAW EIAA, ENGINEERING CHANGE/REPAIR AUTHORIZATION NR 916-53-016-2. (M)