# NTSB investigations: Pratt & Whitney R-985 series, 1991, ND

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 CHI91DTG08](https://openairdocs.org/ntsb/CHI91DTG08.md): Grumman G164B · Minto, ND · Accident · No injuries · Final report · Aug 17, 1991 · N8351K · Substantial damage
  > Inadequate aircraft servicing, inadequate aircraft preflight, fuel contamination, and unsuitable soft terrain in which to effect an emergency landing.
- [NTSB CHI91DTG03](https://openairdocs.org/ntsb/CHI91DTG03.md): Schweizer G164 · Gwinner, ND · Accident · No injuries · Final report · Jun 16, 1991 · N48687 · Substantial damage
  > Inadvertent closing of the mixture by the pilot. Factors related to the accident are inadequate control shape, or size, and inattentiveness of the pilot.

## 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 year(c."eventDate") = 1991
  AND c."eventStateOrRegion" = 'ND' 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 ('52008'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52008&state=ND&year=1991

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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.