# Accident 19851206061059A: Helio H391B, Bozeman, MT, December 6, 1985

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: December 6, 1985, 14:34 local time
- Place: Bozeman, MT
- Airport: Gallantin
- Damage: Substantial damage
- Phase of flight: Forced/Precautionary Landing
- Operating rules: General operating rules (Part 91)
- Location: 45.7691° N, 110.9298° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=45.7691&lon=-110.9298&mi=10
- Aircraft: N4101D, a cancelled registration (https://openairdocs.org/deregistered/N4101D-2013-03-07) (OpenAirDocs)
- Registry model: Helio H-391B (registry code 4300106, https://openairdocs.org/model/helio-h-391b) (OpenAirDocs)
- Registry engine: Lycoming GO-435C&D series (registry code 41521, https://openairdocs.org/engine/lycoming-go-435c-d-series) (OpenAirDocs)
- Reported make and model: HELIO H391B
- Reported engine: LYC GO435
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 3,200 total, 42 in this make and model, 0 in the last 90 days
- NTSB investigation: [NTSB DEN86LA040](https://openairdocs.org/ntsb/DEN86LA040) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19851206061059A

## Narrative

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

MAGNETOS GROUNDED, P LEAD INSULATION WORN, SHORTED OUT. SHOULD HAVE TURNED OFF MASTER SWITCH WHEN SMELLED SMOKE.

## 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 DEN86LA040](https://openairdocs.org/ntsb/DEN86LA040), Dec 6, 1985: Helio H-391B (N4101D), Bozeman, MT, substantial damage

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.

---
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.