# NTSB SEA89LA095: Bell 206B III, N2756Y, Lewiston, ID, May 30, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 30, 1989, 11:30 local (18:30 UTC)
- Place: Lewiston, ID
- Coordinates: 46.159252, -116.920722 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.1593&lon=-116.9207&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report March 29, 1991
- Report: Approved by Office Director
- NTSB case key (mKey): 41020
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA89LA095
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41020/pdf
- Page: https://openairdocs.org/ntsb/SEA89LA095

## Probable cause

A LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. A FACTOR IN THE ACCIDENT WAS THE LACK OF SUITABLE TERRAIN FOR A FORCED LANDING.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - nonmechanical, cruise - normal
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
  - terrain condition - none suitable (contributing factor)
- In flight collision with terrain/water, descent - emergency
  - terrain condition - mountainous/hilly (contributing factor)
- Roll over, landing - flare/touchdown

## Analysis

DURING CRUISE FLIGHT, THE PILOT REPORTED THAT THE ENGINE LOST POWER. A FORCED LANDING WAS INTIATED ON SLOPING TERRAIN. THE HELICOPTER COLLIDED WITH THE TERRAIN AND ROLLED OVER. THE WRECKAGE WAS REMOVED FOR INSPECTION. AN ENGINE TEST RUN WAS PERFORMED WITH NO MECHANICAL FAILURES OR MALFUNCTIONS REPORTED.

## Aircraft

- Registration: [N2756Y](https://openairdocs.org/deregistered/N2756Y-1996-10-17), registration cancelled 1996-10-17, S/N 2710 (OpenAirDocs)
- Reported make and model: BELL 206B III
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2710
- Engines: ALLISON 250-C20B 420 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Operator: Jerry Wilson, doing business as Hillcrest Aircraft Co., Inc
- Registered owner: Gerald Wilson
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, January 3, 1989, 5 hours before
- Departed: LWS, LEWISTON, ID
- Destination: MYL, MCCALL, ID
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; airline transport; airplane ratings: single-engine land; instrument ratings: helicopter; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 5,336 total, 2,957 in this make and model, 4,607 as pilot in command

## Weather

- Conditions: Visual (VMC), Night/bright
- Wind: 360° at 8 knots
- Visibility: 40 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 39 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19890530013299A](https://openairdocs.org/incident/19890530013299A), May 30, 1989: Bell 206B, Lewiston, ID, Substantial damage. Reported overspeed condition from governor malfunction. Allowed rotor speed decay. Landed side slope. Rolled over.

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.

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