# Final NTSB investigations, ND: Gear collapsed

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 CHI98LA001](https://openairdocs.org/ntsb/CHI98LA001.md): Cessna T210N · Fargo, ND · Accident · No injuries · Limited investigation · Final report · Oct 1, 1997 · N5168A · Substantial damage
  > the circuit breaker for the hydraulic pump popped during gear extension which resulting in the failure of the landing gear to lock in the extended position.
- [NTSB CHI94LA087](https://openairdocs.org/ntsb/CHI94LA087.md): Piper PA-44-180 · Grand Forks, ND · Accident · No injuries · Limited investigation · Final report · Feb 13, 1994 · N190ND · Substantial damage
  > the improper maintenance installation (cotter pin) by other maintenance personnel. Factors were main landing gear scissors not safetied properly and extension of landing gear not possible by pilot-in-command (CFI).
- [NTSB DEN86LA196](https://openairdocs.org/ntsb/DEN86LA196.md): Beech 95-B55 · Fargo, ND · Accident · No injuries · Limited investigation · Final report · Jul 13, 1986 · N67297 · Substantial damage
  > The plt said that he activated the landing gear retraction switch during the landing roll. The gear retracted causing the acft to settle on the rwy.

## 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" = 'ND' AND c."eventCountry" = 'USA'
  AND c."completionStatus" = 'Completed'
  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" = 190)
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?occurrence=190&state=ND&status=final

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