# NTSB investigations, 2020: Dynamic rollover

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 ERA21LA046](https://openairdocs.org/ntsb/ERA21LA046.md): Robinson R44 · Austell, GA · Accident · No injuries · Class 4 · Limited · Final report · Nov 18, 2020 · N442JP · Substantial damage
  > The flight instructor’s failure to maintain adequate clearance above the gravel surface in a hover, which resulted in a dynamic rollover.
- [NTSB CEN21LA081](https://openairdocs.org/ntsb/CEN21LA081.md): Schweizer 269C · Rhame, ND · Accident · No injuries · Class 4 · Limited · Final report · Nov 7, 2020 · N2081G · Substantial damage
  > The pilot landed the helicopter on unsuitable terrain, which resulted in a rollover.
- [NTSB CEN21LA021](https://openairdocs.org/ntsb/CEN21LA021.md): Robinson Helicopter R44 II · Washington, WI · Accident · No injuries · Class 4 · Limited · Final report · Oct 18, 2020 · N31136 · Substantial damage
  > The pilot’s failure to maintain lateral control during a hover and improper recovery action after the helicopter contacted the ground, which resulted in a dynamic rollover sequence and an impact with terrain.
- [NTSB CEN20CA180](https://openairdocs.org/ntsb/CEN20CA180.md): Rotorway Exec · Rochester, IN · Accident · Minor injuries · Class 4 · Data collection · Final report · May 16, 2020 · N311RM · Substantial damage
  > The pilot's failure to maintain control of the helicopter during lift off. Contributing to the accident was the pilot's lack of recent experience flying a helicopter.
- [NTSB CEN20CA090](https://openairdocs.org/ntsb/CEN20CA090.md): Robinson R22 · Cotulla, TX · Accident · No injuries · Data collection · Final report · Feb 18, 2020 · N10786 · Substantial damage
  > The pilot's failure to remove the right skid trailer tie-down before attempting to take off, which resulted in a dynamic roll-over.
- [NTSB WPR20CA059](https://openairdocs.org/ntsb/WPR20CA059.md): Sud SE 3130 Alouette II · Mokelumne Hills, CA · Accident · No injuries · Data collection · Final report · Jan 4, 2020 · N92785 · Substantial damage
  > The pilot's failure to maintain adequate clearance from terrain during a hover-taxi, which resulted in the helicopter's skid contacting grass and a subsequent dynamic roll-over.

## 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") = 2020
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '231' 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/231/sequence?year=2020

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