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| Date: | Tuesday 20 December 1977 |
| Time: | 15:00 |
| Type: |  Bell 47G-3B1 |
| Owner/operator: | Private |
| Registration: | N7860S |
| MSN: | |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | near Billings, Mt -
 United States of America
|
| Phase: | Take off |
| Nature: | Executive |
| Departure airport: | |
| Local | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
ATTMTD AUTOROTATION DUE LOUD NOISE. COLLECTIVE WAS INOP. WRONG TRANSMISSION INSTALLED.
Accident investigation:
|
Sources:
NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|
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