# Accident 19870729046029A: Bell STC204, Dubois, WY, July 29, 1987

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 29, 1987, 09:50 local time
- Place: Dubois, WY
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Rotorcraft external load (Part 133)
- Operator: ILFA
- Location: 43.5292° N, 109.6399° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=43.5292&lon=-109.6399&mi=10
- Aircraft: N4580Y, a cancelled registration (https://openairdocs.org/deregistered/N4580Y-2002-04-29) (OpenAirDocs)
- Registry model: Bell 204-B (registry code 1181404, https://openairdocs.org/model/bell-204-b) (OpenAirDocs)
- Registry engine: Lycoming T-53 series (registry code 41552, https://openairdocs.org/engine/lycoming-t-53-series) (OpenAirDocs)
- Reported make and model: BELL STC204
- Reported engine: LYC T5313B
- Fatal injuries: 0
- Pilot flight hours: 5,200 total, 1,600 in this make and model, 150 in the last 90 days
- NTSB investigation: [NTSB DEN87LA199](https://openairdocs.org/ntsb/DEN87LA199) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19870729046029A

## Narrative

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

ENGINE QUIT DURING SEISMIC SLING LOAD OPERATIONS. AUTO ROTATED INTO TREES AND ROUGH TERRAIN.

## 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 DEN87LA199](https://openairdocs.org/ntsb/DEN87LA199), Jul 29, 1987: Bell 204B (N4580Y), Dubois, WY, substantial damage

## Other reports on N4580Y (1)

Matched to the same aircraft by N-number and date.

- [Accident 19970416006029A](https://openairdocs.org/incident/19970416006029A), Apr 16, 1997: Bell 204B (N4580Y), Calderwood, TN, Destroyed. Forest fire flight. Filled water bucket. Loud bank. Lost power. Autorotated to trees. Rotor drive shaft failed. (-23) pilot was sling loading water to a forest…

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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