As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FS409+128 VERTICAL POST BL0.00 RIGHT SIDE HAS INDICATION NOTED .300 LONG 70% FSH AT AFT FLANGE RADIUS, FAILS NDT. AIRCRAFT REMOVED FROM SERVICE REPLACED FS409+128 VERTICAL POST AT BL0.00 RIGHT SIDE IAW CRJ200 SRM 51-42-06 AND BOMBARDIER REO 601R53-41-889 REV. D, DATED 2018-10-04.