# Accident 19901203052389A: Aerosp SA316B, Vernal, UT, December 3, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: December 3, 1990, 14:45 local time
- Place: Vernal, UT
- Damage: Destroyed
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Air taxi and commuter (Part 135)
- Operator: KBTA
- Location: 40.5506° N, 109.5693° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=40.5506&lon=-109.5693&mi=10
- Aircraft: N316BS, a cancelled registration (https://openairdocs.org/deregistered/N316BS-1991-04-22) (OpenAirDocs)
- Registry model: Aerospatiale SA316B ALOUETTE III (registry code 8680515, https://openairdocs.org/model/aerospatiale-sa316b-alouette-iii) (OpenAirDocs)
- Reported make and model: AEROSP SA316B
- Reported engine: TMECA ARTOUSTE3B
- Fatal injuries: 0
- Pilot flight hours: 7,363 total, 2,055 in this make and model, 147 in the last 90 days
- NTSB investigation: [NTSB SEA91LA028](https://openairdocs.org/ntsb/SEA91LA028) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19901203052389A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

VIBRATION IN CYCLIC. ELECTED TO LAND IN CLEARING. LOST ROTOR RPM. SPUN PRIOR IMPACT. SUSPECT ROTOR BLADE DAMPERS.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB SEA91LA028](https://openairdocs.org/ntsb/SEA91LA028), Dec 3, 1990: Aerospatiale SA316B (N316BS), Vernal, UT, destroyed. Probable cause: A MALFUNCTION/FAILURE OF THE HELICOPTER'S MAIN ROTOR LEAD-LAG DAMPER.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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