What was found
AFT SIDE STA 676, STR 8L CRACKED IN RADIUS IN UPPER HAT FLANGE APPROXIMATELY 2" FROM FORWARD END. STR 8L AT STA 676 IAW ENGINEERING SKETCH ES 02821. CRACKED 2.0", PN 143T3001-6, STR 8L, LOCATION AT STA TO 709, STR LOCATION S8L. ACFT WAS GROUNDED.