As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THE AFT PORTION OF THE TAIL BOOM WHERE THE TAIL BOOM ATTACHES TO FENESTRON INTERNALLY IN THE LOWER PORTION (INSIDE ACCESS PANEL) THE TAIL BOOM RING FRAME HAS WHAT APPEARS TO BE CORROSION FROM LATENT MOISTURE WHICH LAYS IN AN AREA WHERE IT CANNOT ESCAPE. THE LOWER INTERNAL PORTION IS HAS PITTING CORROSION.