As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) INVESTIGATION REVEALED A SHEARED TAIL WHEEL STEERING TORQUE TUBE ASSEMBLY (WATER RUDDER). INTERNAL CORROSION WAS PRESENT INSIDE THE TUBE ASSEMBLY. NO ABNORMAL CONDITION PRESENT ON THE EXTERNAL PORTION OF THE TUBE.THE TORQUE TUBE FAILURE TOOK PLACE AT THE WELDED JUNCTION OF THE SPLINE SHAFT AND TUBE ASSEMBLY.