| Crash location | Unknown |
| Nearest city | Afton, WY
42.724928°N, 110.931869°W |
| Tail number | N739XX |
|---|---|
| Accident date | 18 Sep 1989 |
| Aircraft type | Cessna 172N |
| Additional details: | None |
THE NON-INSTRUMENT RATED PILOT'S CONTINUED FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC) AND HIS FAILURE TO MAINTAIN SUFFICIENT ALTITUDE TO CLEAR THE TERRAIN. FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS, ADVERSE WEATHER CONDITIONS, AND RISING/MOUNTAINOUS TERRAIN.