As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A VISUAL INSPECTION OF THE ACFT FOUND AN AREA ON THE TAIL BOOM THAT LOOK LIKE CORROSION ON THE TAIL BOOM AT LT SIDE BL 300 STA 7600 WL 2800. AFTER INSPECTING THE WHOLE TAIL BOOM ASSEMBLY A CRACK WAS FOUND AT BL 50 WL 3000 STA 9700 RT SIDE 1 INCH IN LENGTH. REPLACED THE TAIL BOOM ASSEMBLY.