# Accident 19900817033939A: Snias AS350B, Juneau, AK, August 17, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 17, 1990, 09:15 local time
- Place: Juneau, AK
- Airport: Juneau International
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Air taxi and commuter (Part 135)
- Operator: HXSA
- Location: 58.3547° N, 134.5785° W: Placed by OpenAirDocs at JUNEAU INTL (JNU), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=58.3547&lon=-134.5785&mi=10
- Aircraft: N26492 (not matched to a registry record)
- Reported make and model: SNIAS AS350B
- Reported engine: TMECA ARRIEL1B
- People aboard: 6
- Fatal injuries: 0
- Pilot flight hours: 910 total, 291 in this make and model, 297 in the last 90 days
- NTSB investigation: [NTSB ANC90LA147](https://openairdocs.org/ntsb/ANC90LA147) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900817033939A

## Narrative

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

ENGINE OVERSPEED. AUTO ROTATED TO SMALL LOT. HIT TAIL ROTOR. PINION DRIVE GEAR FROM GEAR NFB TO MO5 UNIT FAILED.

## 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 ANC90LA147](https://openairdocs.org/ntsb/ANC90LA147), Aug 17, 1990: Aerospatiale AS-350-B (N26492), Juneau, AK, substantial damage. Probable cause: FAILURE OF THE FREE TURBINE INTERMEDIATE PINION DRIVEN GEAR AND SUBSEQUENT DISINTEGRATION OF THE FREE TURBINE ASSEMBLY.

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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