What was found
FUSELAGE SKIN FS 700-720B STRINGER 4R, SKIN LAP SPLICE:CRACK REPAIR. LFEC INSPECTION OF THE STRINGER 4R SKIN LAP SPLICE BETWEEN FS 680 AND 740 INDICATED CRACKS IN THE LOWER FASTENER ROW OF THE LOWER SKIN. INTERNAL HFEC INSPECTION CONFIRMED CRACKS BETWEEN FS 700 AND 720 AND BETWEEN FS 720A AND 720B. THE CRACKS WERE ROUTED OUT OF THE SKIN LAP AND REPAIRED WITH EXTERNAL ALUMINUM DOUBLERS PER B727 SRM 53-30-3, FIG 5 AND DOCUMENTED PER ER/A 367139-14AD.