As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DEACTIVATION OF THE NOSE LANDING GEAR STEERING SYSTEM, THE NOSE WHEELS TURNED 90 DEGREES RIGHT WITHOUT ANY STEERING INPUT WHEN STEERING / ANTI-SKID SWITCH WAS TURNED OFF. AT THAT MOMENT THE THE AIRCRAFT CONDITION WAS:-STEERING BY-PASS PIN INSTALLED IN TOW POSITION.-BOTH ENGINE MASTER SWITCH OFF. -GREEN ELECTRICAL HYDRAULIC PUMP ON.-UPON REMOVING AND OPENING THE SOLENOID VALVE ASSY , WE DISCOVERED THAT THE LINER (MADE OF ALUMINIUM ALLOY) WAS BROKEN (SHEARED).