As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUSELAGE FS409+128 VERTICAL POST AT RBL18 HAS AN INDICATION .2" LONG BY 60% FSH IN THE AFT RADIUS OF THE INBD SIDE @ WL69. FAILED NDT INSPECTION. (C-CHECK RO 4/1/2021) REMOVED AND INSTALLED NEW SERVICEABLE VERTICAL POST AT RBL 18 IAW REO 601R-53-41-889 REV D DATED 2018-10-04. FORM 337 AND MAJOR REPAIR TASK CARD COMPLETED AND ATTACHED. WEIGHT CHANGE NEGLIGIBLE . REFERENCE CONTINUE CARD FOR DETAILS.