What was found
DETAILED INSPECTION OF THE FS 409.0 +128 FRAME AND CAP AFT ANGLES AT STR21 LEFT AND RIGHT, A CRACK WAS FOUND AT THE BOTTOM OF THE LBL18 VERTICAL POST ON THE OB SIDE. THE CRACK WAS FOUND AT THE THE BOTTOM OF THE LBL18 VERTICAL POST ON THE OB SIDE. THE CRACK ORIGINATES FROM THE BOTTOM OF THE POST BENEATH THE BOTTOM MOST RIVET AND MOVES UPWARD THROUGH THE FIRST RIVET CONTINUING TOWARDS AND/OR THROUGH THE SECOND RIVET. CRACK REPAIRED IAW REO 601R-53-41-0056 REV. F