| Crash location | Unknown |
| Nearest city | Woonsocket, SD
44.068043°N, 98.271199°W |
| Tail number | N3634E |
|---|---|
| Accident date | 08 May 1990 |
| Aircraft type | Piper PA-36-375 |
| Additional details: | None |
FAILURE OF THE PILOT OF N3634E TO FOLLOW THE BRIEFED PLAN OF OPERATION, AND FAILURE OF BOTH PILOTS TO SEE-AND-AVOID EACH OTHER (INADEQUATE VISUAL LOOKOUT).