What was found
DURING OP 16 MAINTENANCE CHECK, FOUND LONGERON 29L CRACKED JUST FORWARD OF STA 578 FRAME. REMOVED AND REPLACED LONGERON END PER INSTL DWG 592176 PER SRM 51-01, ITEM C. INSTALLED NEW STRINGER PER INSTL DWG 592176 AND SRM 51-60-0. ACFT TT: 77,210 HOURS. ACFT TC: 84,221. (X)