As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE BASE VISIT FOUND THE RIGHT VERTICAL STABILIZER TO FUSELAGE ATTACH DRAG ANGLE TO HAVE A POSSIBLE CRACK JUST AFT OF REAR SPAR DATUM 67.590. THE AIRCRAFT WAS REMOVED FROM SERVICE. REPAIRED IAW EO CR-53MR-164R1. THE AIRCRAFT WAS RETURNED TO SERVICE.