# Accident 19900716026329A: Skrsky S58BT, Ovando, MT, July 16, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 16, 1990, 10:30 local time
- Place: Ovando, MT
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Rotorcraft external load (Part 133)
- Location: 47.0693° N, 113.0405° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=47.0693&lon=-113.0405&mi=10
- Aircraft: N439DS, a cancelled registration (https://openairdocs.org/deregistered/N439DS-2000-11-02) (OpenAirDocs)
- Registry model: Sikorsky S-58BT (registry code 8141840, https://openairdocs.org/model/sikorsky-s-58bt) (OpenAirDocs)
- Reported make and model: SKRSKY S58BT
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 6,298 total, 1,248 in this make and model, 250 in the last 90 days
- NTSB investigation: [NTSB SEA90LA137](https://openairdocs.org/ntsb/SEA90LA137) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900716026329A

## Narrative

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

NR1 ENGINE FAILED AT HOVER AND FIRE FROM TAILPIPE. DELAYED AUTOROTATION. HARD LANDING. ENGINE OVERHEATED IN HOVER.

## 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 SEA90LA137](https://openairdocs.org/ntsb/SEA90LA137), Jul 16, 1990: Sikorsky S-58BT (N439DS), Ovando, MT, substantial damage. Probable cause: THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.

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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