| Crash location | Unknown |
| Nearest city | Yellowstonepark, WY
44.620121°N, 110.490891°W |
| Tail number | N44AZ |
|---|---|
| Accident date | 04 Jul 1991 |
| Aircraft type | Jerrell RV-4 |
| Additional details: | None |
A COLLAPSED INDUCTION AIR DUCT. FACTORS INCLUDE INADEQUATE DESIGN BY THE MANUFACTURER/BUILDER, AND A MISJUDGED RATE OF DESCENT BY THE PILOT.