What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON LT AFT SHEAR WEB SUPPORT ANGLE, AT FR 69, + 18.00", STR 23L. HAS CORROSION THAT IS BEYOND ALLOWABLE LIMITS PER SRM 51-73-11, ON THE UPPER AND LOWER SURFACES; REMOVED AND REPLACED THE LT SHEAR WEB SUPPORT ANGLE AT FR 69-70, STGR 23L, IAW SRM 51-42-11 AND SRM 51-72-11 ) REF. P/N: D53471123202. REF LCQ NR 24388.