# NTSB investigations, WY: Flight control sys malf/fail

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 WPR20LA301](https://openairdocs.org/ntsb/WPR20LA301.md): Lake LA4 · Rawlins, WY · Accident · 1 fatal · Class 3 · Limited · Final report · Aug 25, 2020 · N93AB · Substantial damage
  > The pilot’s decision to depart despite a known mechanical trim malfunction and with a high-density altitude and the airplane at or above its maximum gross weight.
- [NTSB WPR12LA341](https://openairdocs.org/ntsb/WPR12LA341.md): Fairchild Hiller FH-1100 · Cody, WY · Accident · No injuries · Limited investigation · Final report · Jul 31, 2012 · N5038F · Substantial damage
  > The failure of a tail rotor driveshaft coupling due to fatigue.
- [NTSB DCA11IA015](https://openairdocs.org/ntsb/DCA11IA015.md): Boeing 757-223 · Jackson Hole, WY · Incident · No injuries · Class 1 · Incident · Final report · Dec 29, 2010 · N668AA · No damage
  > a manufacturing defect in a clutch mechanism that prevented the speedbrakes from automatically deploying after touchdown, and the captain’s failure to monitor and extend the speedbrakes manually. Also causal was the failure of the thrust reversers to deploy…
- [NTSB WPR09LA028](https://openairdocs.org/ntsb/WPR09LA028.md): Hiller UH-12E · Powder River, WY · Accident · Minor injuries · Limited investigation · Final report · Oct 30, 2008 · N61436 · Substantial damage
  > A flight control system malfunction while the helicopter was maneuvering at low altitude due to the failure/separation of the rotor blade control tube.

## 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" = 'WY' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '333' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/333/sequence?state=WY

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