| Crash location | Unknown |
| Nearest city | Hayward, CA
37.668821°N, 122.080796°W |
| Tail number | N3588Y |
|---|---|
| Accident date | 27 Apr 1988 |
| Aircraft type | Piper PA-31-350 |
| Additional details: | None |
PILOT'S FAILURE TO DETECT AN UNCOMMANDED PROPELLER FEATHERING PROCEDURES ESTABLISHED IN THE PILOT'S OPERATING HANDBOOK.