At about 19:10 Alaska time, a Cessna 207A was damaged during an emergency landing at the Deadhorse Airport, but the pilot was not injured. The pilot said he was in cruise flight about 10 minutes after departure when he noted a light sheen of oil on the windshield. He turned around but could not see through the windshield by the time he was about two miles from the airport. While the airplane was on approach to runway 4 the propeller rpm increased for about 20 seconds, then the propeller departed the airplane. The pilot glided to a landing at the airport. The propeller and engine crankshaft flange were located and sent to the NTSB metallurgical laboratory for examination. The airplane was equipped with a Continental IO-520-F engine.