| Crash location | Unknown |
| Nearest city | Bridgeport, CA
39.291559°N, 121.194679°W |
| Tail number | N146RM |
|---|---|
| Accident date | 27 Nov 1991 |
| Aircraft type | Aerospatiale Sa 316B |
| Additional details: | None |
FAILURE OF THE HELICOPTER'S TAIL ROTOR DRIVE SHAFT AND DRIVE SHAFT BEARING DUE TO UNDETERMINED REASON(S).