# NTSB investigations: AiResearch TPE331 series, IL

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB CHI07LA207](https://openairdocs.org/ntsb/CHI07LA207.md): Weatherly 620B · Wyoming, IL · Accident · 1 fatal · Limited investigation · Final report · Jul 13, 2007 · N9026E · Substantial damage
  > The pilot's failure to maintain clearance with the power lines during the aerial application flight. Contributing to the accident were the power lines and the low altitude.
- [NTSB CHI07LA108](https://openairdocs.org/ntsb/CHI07LA108.md): Swearingen SA-226T · Wheeling, IL · Accident · No injuries · Limited investigation · Final report · Apr 11, 2007 · N125WG · Substantial damage
  > Partial failure of the left engine propeller governor during the takeoff ground roll. Factors included that directional control was not possible by the pilot which subsequently led to a collision with an airport sign.
- [NTSB CHI01LA302](https://openairdocs.org/ntsb/CHI01LA302.md): Swearingen SA226-T · West Chicago, IL · Accident · No injuries · Limited investigation · Final report · Aug 28, 2001 · N104BR · Substantial damage
  > the checklist not followed and the directional control not maintained by the pilot. A contributing factor was the left propeller’s start locks being engaged.
- [NTSB CHI88IA141](https://openairdocs.org/ntsb/CHI88IA141.md): Swearingen SA226-TC · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Jun 22, 1988 · N329BA · No damage
  > Failure of the front motor bearing in the sas servo motor assembly, and the resultant 'jamming' of the elevator control cables. The pilot aborted the takeoff as a result of the vibration in the yoke.
- [NTSB CHI88IA097](https://openairdocs.org/ntsb/CHI88IA097.md): Fairchild SA-226-TC · Bloomington, IL · Incident · Minor injuries · Incident investigation · Final report · Apr 11, 1988 · N332BA · No damage
  > Physical incapacitation due to an organic pathogen. Contributing factors are anxiety and self-induced pressure.
- [NTSB CHI81FEV29](https://openairdocs.org/ntsb/CHI81FEV29.md): Aero Comdr 695 · Peoria, IL · Accident · Serious injuries · Closed · Aug 2, 1981 · N9767S · Substantial damage

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'IL' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('01514', '01517'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=01514&state=IL

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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.