# NTSB investigations: External power system

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 WPR26LA343](https://openairdocs.org/ntsb/WPR26LA343.md): Aerovodochody L-29 Delfin · Roswell, NM · Accident · No injuries · Class 4 · Limited · Final report · Sep 12, 2026 · N29AD · Substantial damage
  > The malfunction of a diode in the airplanes electrical system that resulted in low batter power and subsequent landing gear collapse.
- [NTSB DCA23LA191](https://openairdocs.org/ntsb/DCA23LA191.md): Embraer ERJ 190-100 IGW · New York, NY · Accident · Serious injuries · Class 4 · Limited · Final report · Feb 25, 2023 · N337JB · No damage
  > Electrical sparking caused by a faulty connection between the aircraft and ground power unit resulting in a serious injury to a ground service agent.
- [NTSB ERA09CA485](https://openairdocs.org/ntsb/ERA09CA485.md): Bell 206L-3 · White Plains, NY · Accident · No injuries · Data collection · Final report · Aug 26, 2009 · N22ZA · Substantial damage
  > The pilot's failure to disconnect the ground power unit prior to takeoff.

## 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."mKey" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '01022440'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/01022440/cases

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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.