# NTSB investigations: Weatherly 201C: Loss of control - on ground/water

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 CHI97LA184](https://openairdocs.org/ntsb/CHI97LA184.md): Weatherly 201C · Buffalo, ND · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1997 · N1299W · Substantial damage
  > the pilot's inadequate preflight planning/preparation, and his failure to maintain directional control of the airplane. Water on the runway and the soft terrain were related factors.
- [NTSB CHI94LA320](https://openairdocs.org/ntsb/CHI94LA320.md): Weatherly 201C · Stephen, MN · Accident · Serious injuries · Limited investigation · Final report · Sep 11, 1994 · N9054W · Substantial damage
  > improper rigging of the parking brake control cable resulting in inadvertent application of the left wheel brake.
- [NTSB DEN82DA111](https://openairdocs.org/ntsb/DEN82DA111.md): Weatherly 201C · Near Rapelje, MT · Accident · No injuries · Final report · Jun 21, 1982 · N9228W · Substantial damage
  > While landing on a county road, the pilot lost directional control and the aircraft veered to the left and struck a pole. An investigation revealed that an 0-ring, pn 101-00500, on the parking brake valve in the right master cylinder had failed and hydraulic…

## 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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('9630410')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 260))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=9630410&occurrence=260

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