# NTSB investigations: Learjet 23, MI

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 CHI95LA013](https://openairdocs.org/ntsb/CHI95LA013.md): Learjet 23 · Holland, MI · Accident · No injuries · Limited investigation · Final report · Oct 14, 1994 · N20TA · Substantial damage
  > The copilot's misjudgment of the touchdown point, and the pilot in command's inadequate supervision to avoid the accident.
- [NTSB CHI91MA224](https://openairdocs.org/ntsb/CHI91MA224.md): Learjet 23 · Detroit, MI · Accident · 3 fatal · Major investigation · Final report · Jul 23, 1991 · N959SC · Destroyed
  > Improper preflight by the pilot, his failure to abort the takeoff while there was sufficient runway remaining, and his failure to assure that the aircraft attained sufficient airspeed for lift-off and climb. Factors related to the accident were: the pilot's…
- [NTSB CHI77FA022](https://openairdocs.org/ntsb/CHI77FA022.md): Lear Jet 23 · Flint, MI · Accident · 2 fatal · Closed · Jan 6, 1977 · N332PC · Destroyed
- [NTSB CHI73AC058](https://openairdocs.org/ntsb/CHI73AC058.md): Lear 23 · Romulus, MI · Accident · 2 fatal · Closed · Dec 15, 1972 · N20M · Destroyed
- [NTSB DCA70AZ008](https://openairdocs.org/ntsb/DCA70AZ008.md): Lear Jet 23A · Pellston, MI · Accident · 6 fatal · Closed · May 9, 1970 · N434EJ · Destroyed
- [NTSB CHI68A0051](https://openairdocs.org/ntsb/CHI68A0051.md): Lear Jet 23 · Detroit, MI · Accident · Minor injuries · Closed · Dec 9, 1967 · N822LJ · Destroyed
- [NTSB CHI68A0039](https://openairdocs.org/ntsb/CHI68A0039.md): Lear Jet 23 · Muskegon, MI · Accident · Minor injuries · Closed · Oct 25, 1967 · N432EJ · Destroyed

## 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" = 'MI' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('5170102'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=5170102&state=MI

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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.