# NTSB investigations, IL: Unknown or undetermined

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 CEN26FA141](https://openairdocs.org/ntsb/CEN26FA141.md): Piper PA-28-140 · Rock Falls, IL · Accident · 1 fatal · Class 3 · Field · Preliminary report · Mar 20, 2026 · N9913W · Destroyed
  > On March 20, 2026, about 1503 central daylight time, a Piper PA-28-140 airplane, N9913W, was destroyed when it was involved in an accident near Rock Falls, Illinois. The student pilot sustained fatal injuries. The airplane was being operated as a Title 14…
- [NTSB CEN26FA132](https://openairdocs.org/ntsb/CEN26FA132.md): Cessna T210M · Deerfield, IL · Accident · 1 fatal · Class 3 · Field · Preliminary report · Mar 5, 2026 · N19FB · Substantial damage
  > On March 4, 2026, about 2145 central standard time, a Cessna T210M airplane, N19FB sustained substantial damage when it was involved in an accident near Deerfield, Illinois. The pilot was fatally injured. The airplane was operated under Title 14 Code of…
- [NTSB ERA26FA114](https://openairdocs.org/ntsb/ERA26FA114.md): Tailwind W-8 · Poplar Grove, IL · Accident · 1 fatal · Class 3 · Field · Preliminary report · Feb 14, 2026 · N9424H · Destroyed
  > On February 14, 2026, about 1600 central standard time, an experimental, amateur-built Tailwind W-8 airplane, N9424H, was destroyed when it was involved in an accident near Poplar Grove, Illinois. The pilot was fatally injured. The airplane was operated as a…
- [NTSB CEN25LA116](https://openairdocs.org/ntsb/CEN25LA116.md): Robinson Helicopter R44 II · Chicago, IL · Accident · No injuries · Class 3 · Limited · Preliminary report · Mar 10, 2025 · N128AF · Substantial damage
  > On March 10, 2025, about 18:30 central daylight time, a Robinson Helicopter R44 II, N128AF was substantially damaged when it was involved in an accident near Chicago, Illinois. The pilot and both passengers were not injured. The helicopter was operated under…
- [NTSB CEN24FA312](https://openairdocs.org/ntsb/CEN24FA312.md): Engineering & Research Ercoupe 415-C · Elkhart, IL · Accident · 1 fatal · Class 3 · Field · Final report · Aug 7, 2024 · N3093H · Destroyed
  > An off-airport landing in a soybean field for reasons that could not be determined. Contributing to the severity of the pilot’s injuries and airplane damage was a fire that occurred at an unknown time.
- [NTSB CEN24LA203](https://openairdocs.org/ntsb/CEN24LA203.md): Pulsar Super Pulsar · Rochelle, IL · Accident · No injuries · Class 3 · Limited · Final report · May 25, 2024 · N912GR · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB CEN23LA403](https://openairdocs.org/ntsb/CEN23LA403.md): Israel Aircraft Industries 1125 Westwind Astra · Wheeling, IL · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2023 · N39TT · Substantial damage
  > A loss of braking effectiveness during landing for reasons that could not be determined, which resulted in a runway excursion.
- [NTSB CEN23LA372](https://openairdocs.org/ntsb/CEN23LA372.md): Pietenpol Aircamper · Hanover, IL · Accident · No injuries · Class 3 · Limited · Final report · Aug 20, 2023 · N929DH · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall during an attempted forced landing at low altitude. Contributing to the accident was the loss of engine power for undetermined reasons.
- [NTSB CEN23FA340](https://openairdocs.org/ntsb/CEN23FA340.md): Richards Heavylift Helo UH-1H · Oakdale, IL · Accident · 1 fatal · Class 3 · Field · Final report · Jul 31, 2023 · N567VF · Substantial damage
  > An in-flight loss of control for undetermined reasons.
- [NTSB CEN23LA306](https://openairdocs.org/ntsb/CEN23LA306.md): Robinson Helicopter R44 II · Pocahontas, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 14, 2023 · N62RK · Substantial damage
  > A reported loss of engine power for undetermined reasons.
- [NTSB CEN23LA295](https://openairdocs.org/ntsb/CEN23LA295.md): Bell UH-1H · Woodlawn, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 11, 2023 · N900VF · Substantial damage
  > The separation of the tail boom from the fuselage for reasons that could not be determined.
- [NTSB CEN23LA145](https://openairdocs.org/ntsb/CEN23LA145.md): Piper PA32 · Lincoln, IL · Accident · Serious injuries · Class 3 · Limited · Final report · Mar 30, 2023 · N56793 · Substantial damage
  > A total loss of engine power during an approach for landing for undetermined reasons.
- [NTSB CEN23LA106](https://openairdocs.org/ntsb/CEN23LA106.md): Jabiru USA Sport J250-SP · Cortland, IL · Accident · No injuries · Class 3 · Limited · Final report · Feb 11, 2023 · N592J · Substantial damage
  > A total loss of engine power for reasons that could not be determined.
- [NTSB CEN22LA361](https://openairdocs.org/ntsb/CEN22LA361.md): Vans RV-10 · Hurst, IL · Accident · No injuries · Class 3 · Limited · Final report · Aug 3, 2022 · N255CP · Substantial damage
  > A loss of engine power for reasons that could not be determined.
- [NTSB CEN22LA323](https://openairdocs.org/ntsb/CEN22LA323.md): Bell 206B · Verona, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 18, 2022 · N6BU · Substantial damage
  > A loss of rotor rpm for reasons that could not be determined.
- [NTSB CEN21LA369](https://openairdocs.org/ntsb/CEN21LA369.md): Robinson Helicopter R44 II · Wheeling, IL · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 11, 2021 · N4043B · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on available information.
- [NTSB CEN21LA100](https://openairdocs.org/ntsb/CEN21LA100.md): Walton Daniel J Sonex · Pecatonica, IL · Accident · Serious injuries · Class 3 · Limited · Final report · Dec 24, 2020 · N610DJ · Substantial damage
  > A total loss of engine power for reasons that could not be determined based on the available information, and the pilot’s exceedance of the airplane’s critical angle of attack following the loss of engine power, which resulted in an aerodynamic stall/spin and…
- [NTSB CEN21FA024](https://openairdocs.org/ntsb/CEN21FA024.md): Glasair III · Ford Heights, IL · Accident · 1 fatal · Class 3 · Field · Final report · Oct 20, 2020 · N713MJ · Substantial damage
  > The loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN20LA352](https://openairdocs.org/ntsb/CEN20LA352.md): Beech 200 · Rockford, IL · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 20, 2020 · N198DM · Destroyed
  > The pilot’s failure to maintain airplane control following a reduction of thrust in the left engine during takeoff. The reason for the reduction in thrust could not be determined based on the available evidence.
- [NTSB CEN20LA342](https://openairdocs.org/ntsb/CEN20LA342.md): Siebel Auriga · Rockford, IL · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 14, 2020 · N505JS · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on available information.
- [NTSB CEN17CA140](https://openairdocs.org/ntsb/CEN17CA140.md): Cessna 172R · Cahokia, IL · Accident · No injuries · Data collection · Final report · Feb 23, 2017 · N51827 · Substantial damage
  > A hard landing for reasons that could not be determined based on the available evidence.
- [NTSB CEN17FA053](https://openairdocs.org/ntsb/CEN17FA053.md): Aircraft Mfg & Design CH601XL Slsa · Marengo, IL · Accident · 1 fatal · Field investigation · Final report · Dec 10, 2016 · N4218 · Destroyed
  > A loss of control in flight for reasons that could not be determined because no anomalies consistent with a preimpact failure or malfunction were identified during the investigation.
- [NTSB CEN15FA289](https://openairdocs.org/ntsb/CEN15FA289.md): Cessna 172P · Bartlett, IL · Accident · 1 fatal · Field investigation · Final report · Jul 3, 2015 · N62681 · Destroyed
  > The pilot’s loss of airplane control for reasons that could not be determined because an examination of the airplane did not reveal any preimpact abnormalities.
- [NTSB GAA15CA161](https://openairdocs.org/ntsb/GAA15CA161.md): Cessna 172S · Galesburg, IL · Accident · No injuries · Data collection · Final report · Jun 10, 2015 · N740SP · Substantial damage
  > Firewall damage reported by maintenance personnel that occurred during an unknown phase of flight, because the accident flight and pilot could not be determined.
- [NTSB CEN12LA455](https://openairdocs.org/ntsb/CEN12LA455.md): Cessna 175A · Shelby, IL · Accident · No injuries · Limited investigation · Final report · Jul 17, 2012 · N7003E · Substantial damage
  > The loss of engine power due to oil starvation for reasons that could not be determined because engine examinations revealed no malfunctions or failures that would have led to oil starvation.

## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?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.