| Crash location | Unknown |
| Nearest city | Russell, MA
42.166758°N, 72.866209°W |
| Tail number | N163B |
|---|---|
| Accident date | 02 Dec 1988 |
| Aircraft type | Bell 47D1 |
| Additional details: | None |
A PILOT INDUCED LOW ROTOR RPM CONDITION, FOLLOWED BY BLADE FLAPPING AS THE MAIN ROTOR BLADE CONTACTED THE TAIL OF THE HELICOPTER.