As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DETAILED INSPECTION OF THE FS 409.0 +128 FRAME AND CAP AFT ANGLES AT STR21 LEFT AND RIGHT. CRACKS WERE FOUND AT THE BOTTOM OF THE LBL27 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 SECONDRIVET. CRACK REPAIRED IAW REO 601R-53-41-0056 REV. F