# Incident 19870206006979I: Agusta A109, Sioux Falls, SD, February 6, 1987

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: February 6, 1987, 21:15 local time
- Place: Sioux Falls, SD
- Airport: Joe Foss Field
- Phase of flight: Normal Cruise
- Operating rules: Air taxi and commuter (Part 135)
- Operator: DYRA
- Location: 43.5820° N, 96.7419° W: Placed by OpenAirDocs at JOE FOSS FLD (FSD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.5820&lon=-96.7419&mi=10
- Aircraft: N33SV (not matched to a registry record)
- Reported make and model: AGUSTA A109
- Reported engine: ALLSN 250C20B
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 4,600 total, 70 in this make and model, 30 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19870206006979I

## Narrative

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

ENGINE SHUTDOWN DUE TO EXCESSIVE OIL TEMPERATURE. RETURNED AND FOUND A DEFECTIVE THERMAL RELIEF VALVE.

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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