# NTSB investigations, CA: Windshear or thunderstorm

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 WPR21LA111](https://openairdocs.org/ntsb/WPR21LA111.md): Piper PA46R-350T · Tehachapi, CA · Accident · 1 fatal · Class 3 · Limited · Final report · Feb 14, 2021 · N40TS · Destroyed
  > The pilot’s encounter with mountain wave activity with severe turbulence, which resulted in a loss of airplane control. Contributing to the accident was the pilot’s failure to obtain a preflight weather briefing.
- [NTSB GAA17CA303](https://openairdocs.org/ntsb/GAA17CA303.md): Dehavilland DHC 6 · Perris, CA · Accident · No injuries · Data collection · Final report · May 24, 2017 · N708PV · Substantial damage
  > The prospective pilot’s improper landing flare and the pilot’s delayed remedial action to initiate a go-around, which resulted in a runway excursion.
- [NTSB GAA16CA228](https://openairdocs.org/ntsb/GAA16CA228.md): Beech C23 · Yucca Valley, CA · Accident · No injuries · Data collection · Final report · May 7, 2016 · N6566R · Substantial damage
  > The pilot's failure to attain airspeed and a positive rate of climb during takeoff in gusty wind conditions, resulting in a loss of directional control, an uncontrolled descent and collision with terrain.
- [NTSB WPR14CA292](https://openairdocs.org/ntsb/WPR14CA292.md): Jonker Sailplanes JS1-C · Truckee, CA · Accident · Serious injuries · Data collection · Final report · Jul 14, 2014 · N501WG · Substantial damage
  > The pilot's failure to maintain aircraft control in gusting wind conditions while on final approach to the runway.
- [NTSB WPR14CA097](https://openairdocs.org/ntsb/WPR14CA097.md): Cameron Balloons US A-400 · Napa, CA · Accident · No injuries · Data collection · Final report · Dec 29, 2013 · N65298 · Substantial damage
  > Failure to maintain clearance from obstacles during a descent that resulted in an inadvertent collision with a pole.
- [NTSB WPR10LA259](https://openairdocs.org/ntsb/WPR10LA259.md): Socata TB-20 · Happy Camp, CA · Accident · 1 fatal · Limited investigation · Final report · May 22, 2010 · N3041Y · Substantial damage
  > The pilot’s inadequate preflight planning and decision to continue to operate under visual flight rules into instrument meteorological conditions, which resulted in an encounter with an embedded thunderstorm and rain showers and moderate to severe turbulence,…
- [NTSB WPR10CA175](https://openairdocs.org/ntsb/WPR10CA175.md): Beech 23 · Twenty Nine Palms, CA · Accident · No injuries · Data collection · Final report · Mar 21, 2010 · N2325Z · Substantial damage
  > The pilot's encounter with a wind shear/downdraft that exceeded the climb performance capabilities of the airplane during initial climb.
- [NTSB LAX08CA276](https://openairdocs.org/ntsb/LAX08CA276.md): Cessna 177RG · Lake Tahoe, CA · Accident · No injuries · Data collection · Final report · Aug 19, 2008 · N8053G · Substantial damage
  > The pilot's inadequate compensation for the wind and density altitude conditions and failure to attain and maintain an adequate airspeed that resulted in a stall/mush.
- [NTSB SEA08LA142](https://openairdocs.org/ntsb/SEA08LA142.md): Cessna 172M · Big Bear City, CA · Accident · Serious injuries · Limited investigation · Final report · May 28, 2008 · N21134 · Substantial damage
  > The pilot's failure to maintain adequate airspeed while on approach to landing that resulted in a stall/mush. Contributing to the accident was the wind shear and the high density altitude condition.

## 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" = 'CA' 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" = '390' 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/390/sequence?state=CA

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