What was found
FOUND BULGE IN SKIN AND 3EA. FAILED FASTENERS ON LONGERON 50R AT AFT FUSELAGE DRAIN PLUG. REMOVED CORRODED LONGERON SECTION AT STATION 1551-1571, LONGERON 50R. SKIN IS OK NO CORROSION FOUND. ACCOMPLISHED REPAIR PER EA 1-5310-T0362240 MAINFRAME CORROSION ON LONGERON L50R STATION 1561. 2 SPLICES MADE FROM 1D1104T AL EXTRUSION 7150-T61511 MP5753142 AND 2 LONGERON REPLACEMENT SECTIONS MADE FROM 1D0554T A EXTRUSIOIN 7150-T61511 MP5757484.