# NTSB investigations: Robinson Helicopter R44: Abrupt maneuver

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 GAA18CA408](https://openairdocs.org/ntsb/GAA18CA408.md): Robinson R44 · Rulo, NE · Accident · No injuries · Data collection · Final report · Jul 10, 2018 · N144DJ · Substantial damage
  > The pilot's improper collective application, which resulted in low rotor rpm during the takeoff climb and a subsequent ground collision. Contributing to the accident was the pilot’s self-induced pressure to complete the operation.
- [NTSB GAA17CA095](https://openairdocs.org/ntsb/GAA17CA095.md): Robinson Helicopter R44 · Separ, NM · Accident · No injuries · Data collection · Final report · Dec 15, 2016 · N835AK · Substantial damage
  > The pilot’s abrupt maneuver to avoid electrical wires during the approach, which resulted in a hard landing.
- [NTSB GAA16CA283](https://openairdocs.org/ntsb/GAA16CA283.md): Robinson Helicopter R44 · Spring Branch, TX · Accident · No injuries · Data collection · Final report · May 28, 2016 · N921ES · Substantial damage
  > The pilot's failure to maintain helicopter control while hovering in gusting tailwind conditions, resulting in the tailboom striking a light pole and impact with terrain.
- [NTSB ERA10LA019](https://openairdocs.org/ntsb/ERA10LA019.md): Robinson R44 · La Belle, FL · Accident · Serious injuries · Limited investigation · Final report · Oct 15, 2009 · N3038W · Substantial damage
  > The loss of main rotor rpm due to the failure of one or more of the drive belts for undetermined reasons.

## 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 ('7640120')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '270' 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/270/sequence?model=7640120

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