| Crash location | Unknown |
| Nearest city | Chino Hills, CA
33.893626°N, 117.727277°W |
| Tail number | N2627Y |
|---|---|
| Accident date | 19 Dec 1987 |
| Aircraft type | Piper PA-30 |
| Additional details: | None |
FAILURE OF BOTH PILOTS TO SEE AND AVOID EACH OTHER AND THUS AVERT THE COLLISION.