# NTSB DEN88FA151: Aerospatiale SA-315B, N47274, Dubois, WY, July 10, 1988

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: July 10, 1988, 11:30 local (17:30 UTC)
- Place: Dubois, WY
- Location: 43.5461° N, 109.6480° W: Placed by OpenAirDocs: center of Dubois, WY, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.5461&lon=-109.6480&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report December 3, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 17380
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN88FA151
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17380/pdf
- Page: https://openairdocs.org/ntsb/DEN88FA151

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, hover
  - turboshaft engine,free(power) turbine - overtemperature (cause)
  - weather condition - high density altitude (contributing factor)
- Forced landing, descent - emergency
  - load jettison - performed
- In flight collision with object, landing
  - autorotation - attempted
  - altitude - inadequate (contributing factor)
  - object - tree(s)

## Aircraft

- Registration: [N47274](https://openairdocs.org/deregistered/N47274-1989-03-22), registration cancelled 1989-03-22, S/N 2449 (OpenAirDocs)
- Reported make and model: AEROSPATIALE SA-315B
- Registry model: [Aerospatiale SA315B](https://openairdocs.org/model/aerospatiale-sa315b) (registry code 8680615) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2449
- Airframe hours: 10590
- Engines: TURBOMECA ARTOUSTE 3B 562 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Other work use, Part 133
- Operator: Rocky Mountain Helicopters,Inc
- Registered owner: Rocky Mountain Helicopters Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 15, 1988, 98 hours before
- Departed: U25
- Destination: U25

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 10,890 total, 6,122 in this make and model, 10,890 as pilot in command, 290 in the last 90 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 68 °F
- Altimeter: 29.00 inHg

## 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 19880710026019A](https://openairdocs.org/incident/19880710026019A), Jul 10, 1988: Aerosp SA315B, Dubois, WY, Destroyed. Engine failed during sling load at hover. Dropped line and autorotated into trees. Engine fire damage. Undetermined

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.