# NTSB investigations, 2011: Inflight upset

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 CEN11LA657](https://openairdocs.org/ntsb/CEN11LA657.md): Cessna P210N · Longview, TX · Accident · No injuries · Limited investigation · Final report · Sep 19, 2011 · N4867K · Substantial damage
  > The flight's inadvertent encounter with a rare and unforecasted mesoscale gravity wave while on base leg, which resulted in a sudden loss of altitude and subsequent collision with trees.
- [NTSB ERA11LA344](https://openairdocs.org/ntsb/ERA11LA344.md): Beech A100 · Gray, TN · Accident · No injuries · Limited investigation · Final report · Jun 15, 2011 · N15L · Substantial damage
  > An encounter with convectively-induced turbulence and icing, which resulted in an in-flight upset and a loss of airplane control.
- [NTSB WPR11FA239](https://openairdocs.org/ntsb/WPR11FA239.md): Brantly B-2B · Weaverville, CA · Accident · 1 fatal · Field investigation · Final report · May 27, 2011 · N222DW · Substantial damage
  > The student pilot's decision to fly in windy conditions that exceeded his capabilities, which resulted in his subsequent loss of helicopter control. Contributing to the accident was his lack of flight experience in the accident helicopter.
- [NTSB WPR11IA213](https://openairdocs.org/ntsb/WPR11IA213.md): Cessna 421B · Truckee, CA · Incident · No injuries · Incident investigation · Final report · May 2, 2011 · N270CS · No damage
  > Fatigue failure of the right flap extend cable during the landing approach.
- [NTSB CEN11FA150](https://openairdocs.org/ntsb/CEN11FA150.md): Piper PA 46-350P · Westcliffe, CO · Accident · 2 fatal · Field investigation · Final report · Jan 9, 2011 · N727MC · Substantial damage
  > The pilot's loss of control following an encounter with moderate to severe weather.

## 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") = 2011
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '271' 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/271/sequence?year=2011

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