# NTSB SEA85LA214: Bell 206BII, N58012, Atlanta, ID, September 14, 1985

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: September 14, 1985, 12:15 local (18:15 UTC)
- Place: Atlanta, ID
- Coordinates: 43.799144, -115.149864 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.7991&lon=-115.1499&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 4 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40238
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA85LA214
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40238/pdf
- Page: https://openairdocs.org/ntsb/SEA85LA214

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, landing
  - turboshaft engine,free turbine governor - failure,partial (cause)
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)
- Roll over, landing - flare/touchdown

## Analysis

A LOSS OF PWR OCCURRED SHORTLY BEFORE TOUCHDOWN. THE LEFT SKID STRUCK A ROCK DURING TOUCHDOWN CAUSING THE ACFT TO ROLL ONTO ITS RIGHT SIDE. TWENTY-FIVE FLT HRS PRIOR TO THIS FLT AN IDENTICAL SITUATION OCCURRED AND A LOOSE AIR LINE TO THE FUEL CONTROL WAS FOUND. ALTHOUGH NO SPECIFIC REASON COULD BE DETERMINED FOR THIS LOSS OF PWR, A SPLIT 'O' RING TO THE GOVERNOR OF THE PY ORIFICE WAS DISCOVERED WHICH COULD ACCOUNT FOR THE PARTIAL PWR LOSS.

## Aircraft

- Registration: [N58012](https://openairdocs.org/deregistered/N58012-2013-04-23), registration cancelled 2013-04-23, S/N 1027, built 1973 (OpenAirDocs)
- Reported make and model: BELL 206BII
- Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511) (OpenAirDocs)
- Registry engine: [Allison 250 SER 400HP](https://openairdocs.org/engine/allison-250-ser-400hp) (registry code 03013, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1027
- Airframe hours: 4942
- Engines: ALLISON 250-C20B 400 horsepower turbo shaft
- Damage: Destroyed
- Flight: Part 135
- Registered owner: Idaho Helicopters
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, January 1, 1985, 36 hours before
- Departed: 52U, ATLANTA, ID

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; commercial; instrument ratings: helicopter; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 2,043 total, 995 in this make and model, 2,043 as pilot in command, 128 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: 10,000 ft broken
- Temperature: 50 °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 19850914047819A](https://openairdocs.org/incident/19850914047819A), Sep 14, 1985: Bell 206B, Atlanta, ID, Destroyed. During autorotation spun around and skid struck rock. Aircraft rolled over. No engine, fuel, fuel line malfunctions

## Other investigations on N58012 (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 ANC75AA070](https://openairdocs.org/ntsb/ANC75AA070), Mar 25, 1975: Bell 206B (N58012), Allison Lake, AK, substantial damage

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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