What was found
FUSELAGE SKIN & KEEL CHORD AT LOWER FWD VHF ANTENNA. FS 730 STR 28L&R. CORROSION REPAIR, THE THE SKIN AROUND THE LOWER VHF ANTENNA CUTOUT WAS FOUND CORRODED. THE HORIZONTAL FLANGES OF THE STRINGER 28L & 28R KEEL CHORDS WERE ALSO FOUND WITH CORROSION. THE SKIN CUTOUT WAS ENLARGED TO REMOVE THE CORROSION AND THE KEEL CHORDS, BLENDED. THE SKIN WAS REPAIRED WITH 2 EXTERNAL DOUBLERS AND THE CHORDS WITH REPAIR ANGLES PER ER/A 383812-14, REV B.