What was found
DURING OP 16 MAINTENANCE CHECK, FOUND LONGERON 30 CRACKED JUST FORWARD OF STA 578 FRAME. INSTALLED NEW LONGERON END PER INSTL DWG 592176 PER SRM 51-01, PG 1 ITEM C. INSTALLED WITH NEW FASTENERS PER SRM 51-60-0 AND INSTL DWG 592176. ACFT TT: 77,210 HOURS. ACFT TC: 84,221. (X)