| Crash location | Unknown |
| Nearest city | Silica, KS
38.351678°N, 98.462017°W |
| Tail number | N904DF |
|---|---|
| Accident date | 31 Jul 1991 |
| Aircraft type | Aero Commander 500B |
| Additional details: | None |
THE FAILURE OF BOTH PILOTS TO MAINTAIN ADEQUATE SEPARATION DURING FORMATION FLIGHT. RELATED FACTORS ARE OVERCONFIDENCE IN PERSONAL ABILITY AND POOR PLANNING/DECISION.