# NTSB investigations, MT: Propeller failure/malfunction

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 SEA05LA121](https://openairdocs.org/ntsb/SEA05LA121.md): Cessna 188A · Fairview, MT · Accident · Minor injuries · Limited investigation · Final report · Jun 20, 2005 · N2133U · Substantial damage
  > While in cruise flight a separation of a propeller blade as a result of a propeller hub crack. Factors contributing to the accident included the installation of an unapproved propeller, and the failure to properly service the propeller with red dyed oil for…
- [NTSB SEA01LA023](https://openairdocs.org/ntsb/SEA01LA023.md): Piper PA-30 · Stevensville, MT · Accident · No injuries · Limited investigation · Final report · Nov 17, 2000 · N7062Y · Substantial damage
  > Fatigue of the right propeller blade resulting in an in-flight separation of the blade tip. A contributing factor was the improper maintenance procedure.
- [NTSB SEA00LA068](https://openairdocs.org/ntsb/SEA00LA068.md): PZL-Bielsko SZD-45A Ogar · Libby, MT · Accident · No injuries · Limited investigation · Final report · Apr 8, 2000 · N54AS · Substantial damage
  > A crack in the propeller blade that developed into a complete separation of the blade.

## 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" = 'MT' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT o.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o."occurrenceNumber" = 1 AND o."occurrenceCode" = 131)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=131&state=MT

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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.