Runway excursion involving a Cessna Aircraft Company 207, VH-RAS, Home Valley Station, WA on 26 July 1994

The pilot reported that the approach and landing were normal with touchdown at 70 kts. Shortly after touchdown the aircraft began to yaw to the right. The pilot used full left rudder and some differential braking in an attempt to stop the yaw but was unsuccessful. As the aircraft approached a runway marker (car tyre) the pilot applied full braking, raised the nose to clear the tyre and shut the engine down. The aircraft cleared the tyre but the nosewheel subsequently collided with a dip in the ground and collapsed. The left tyre blew out at the same time. Subsequent inspection failed to disclose the reason for the yaw. The wind was light at the time of the landing.