# NTSB investigations, IL: Near midair/TCAS alert/loss of separation

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 DCA24WA250](https://openairdocs.org/ntsb/DCA24WA250.md): Boeing 737 · Chicago, IL · Occurrence · Class 5 · Foreign · Jul 28, 2024 · EI-GZC · No damage
- [NTSB OPS10IA155](https://openairdocs.org/ntsb/OPS10IA155.md): Embraer EMB-135KL · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Apr 22, 2010 · N806AE · 2 aircraft · No damage
  > The air traffic controller's issuance of an improper takeoff clearance to the pilot of the Embraer. Contributing to the incident was the instructor’s inadequate monitoring of the trainee local controller.
- [NTSB OPS09IA006](https://openairdocs.org/ntsb/OPS09IA006.md): Mcdonnell Douglas MD80 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Jun 1, 2009 · 2 aircraft · No damage
  > The Chicago TRACON West Arrival controller's omission of a required clearance, resulting in AAL 879 overshooting the final for runway 28 and losing separation with AAL 93.
- [NTSB OPS09IA001](https://openairdocs.org/ntsb/OPS09IA001.md): Peoria, IL · Incident · No injuries · Incident investigation · Final report · Sep 22, 2008 · 2 aircraft · No damage
  > The tower local controller's failure to provide adequate separation between EGF4075 and SKW5961 that landed on intersecting runways.
- [NTSB OPS08IA011](https://openairdocs.org/ntsb/OPS08IA011.md): Learjet 60 · Chicago, IL · Incident · No injuries · Incident investigation · Final report · Jul 21, 2008 · N252RP · 2 aircraft · No damage
  > The LC-10 controller's failure to ensure the appropriate separation between two airplanes operating on runways where flight paths intersect.

## 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" = '260' 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/260/sequence?state=IL

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