| Crash location | Unknown |
| Nearest city | Richmond, CA
37.935758°N, 122.347749°W |
| Tail number | N83858 |
|---|---|
| Accident date | 29 Jun 1992 |
| Aircraft type | Robinson R22 |
| Additional details: | None |
A DIVERGENCE OF THE MAIN ROTOR FROM ITS NORMAL PLANE OF ROTATION FOR AN UNDETERMINED REASON(S) WHICH RESULTED IN ROTOR CONTACT TO THE TAILBOOM.