| Crash location | Unknown |
| Nearest city | Billings, MT
45.783286°N, 108.500690°W |
| Tail number | N6887Y |
|---|---|
| Accident date | 18 Dec 1992 |
| Aircraft type | Cessna 550 |
| Additional details: | None |
THE PILOT-IN-COMMAND'S FAILURE TO FOLLOW ESTABLISHED VORTEX AVOIDANCE PROCEDURES, AS PUBLISHED IN THE AIRMAN'S INFORMATION MANUAL, TO PROVIDE HIS OWN WAKE TURBULENCE SEPARATION.