What was found
DURING MAINTENANCE SERVICE CHECK, RIVETS WERE FOUND TO HAVE BROKEN OR MISSING HEADS AT LOWER FUSELAGE CENTER LINE, FRAME 21 STA FS 6842.6. FURTHER INSPECTION REVEALED FUSELAGE SKIN (P/N 120-92030-001), TO HAVE CORROSION BETWEEN SKIN AND TITANIUM REINFORCING STRAP (P/N 120-22409-001). AIRCRAFT WAS REPAIRED IN ACCORDANCE WITH EMB REPAIR EST-061/95 AND AERODESIGN AIRCRAFT ENGINEERING REPORT 1437-7. CORROSION AREA APPROX 1.0 INCH BY 1.5 INCH, 30 PERCENT OF THICKNESS.