# NTSB investigations: Continental IO-520-F, 1991

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 ANC91LA038](https://openairdocs.org/ntsb/ANC91LA038.md): Cessna 207 · Saint Marys, AK · Accident · Minor injuries · Limited investigation · Final report · Mar 27, 1991 · N9968M · Substantial damage
  > The pilot-in-command's failure to maintain VFR flight in instrument meteorological conditions while maneuvering on a VFR flight plan. Factors related to the accident was the pic's failure to evaluate the weather conditions that existed.
- [NTSB ANC91LA027](https://openairdocs.org/ntsb/ANC91LA027.md): Cessna 207 · Kivalina, AK · Accident · Minor injuries · Limited investigation · Final report · Feb 10, 1991 · N9651M · Substantial damage
  > The pilot's failure in not identifying the weather conditions along the route. Contributing to the accident was improper in flight planning and decision by the PIC and the whiteout conditions.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('17237'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=17237&year=1991

---
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.