As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT FUSELAGE-TO-FIN CONNECTING ANGLE AT THE BASE OF THE VERTICAL STABILIZER AT FS 16128.0, TWO CRACKS .25 INCH LONG TRAVELING FORWARD FROM TWO FASTENERS. THIS PROBLEM WAS DISCOVERED DURING B-CHECK INSPECTION. RECOMMEND A DETAILED VISUAL INSPECTION BE CALLED OUT DURING C-CHECK INSPECTION.