# NTSB investigations: Robinson Helicopter R44 II: Loss of control on ground

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 ERA24LA042](https://openairdocs.org/ntsb/ERA24LA042.md): Robinson Helicopter R44 II · Ogdensburg, NY · Accident · No injuries · Class 4 · Limited · Final report · Nov 18, 2023 · N789GR · Substantial damage
  > The loss of control of the helicopter during taxi, which resulted in rollover.
- [NTSB ERA22LA135](https://openairdocs.org/ntsb/ERA22LA135.md): Robinson Helicopter R44 II · White Plains, NY · Accident · No injuries · Class 4 · Limited · Final report · Feb 17, 2022 · N929WA · Substantial damage
  > The pilot’s failure to maintain stabilized lateral control during landing in gusty conditions which resulted in a dynamic rollover when the skids contacted the platform unevenly.
- [NTSB ERA21LA387](https://openairdocs.org/ntsb/ERA21LA387.md): Robinson Helicopter R44 II · Miami, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 28, 2021 · N212HT · Substantial damage
  > The pilot’s loss of helicopter control after landing. Also causal was the pilot’s intentional operation of the helicopter without the required training, experience, and endorsements.
- [NTSB ERA18LA269](https://openairdocs.org/ntsb/ERA18LA269.md): Robinson R44 · Westminster, MD · Accident · No injuries · Limited investigation · Final report · Sep 30, 2018 · N440SH · Substantial damage
  > The pilot's attempt to move the helicopter from a sloped surface after an overspeed event, which resulted in a loss of helicopter control and impact with a car. The overspeed event resulted from misrouted and damaged wiring in the magneto, which subsequently…
- [NTSB WPR16LA168](https://openairdocs.org/ntsb/WPR16LA168.md): Robinson R44 · Kailua/Kona, HI · Accident · No injuries · Limited investigation · Final report · Aug 26, 2016 · N74805 · Substantial damage
  > An on-ground upset for reasons that could not be determined because postaccident examination of the helicopter revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB GAA16CA009](https://openairdocs.org/ntsb/GAA16CA009.md): Robinson Helicopter R44 II · Ketchikan, AK · Accident · No injuries · Data collection · Final report · Oct 6, 2015 · N779DZ · Substantial damage
  > The pilot's failure to maintain directional control during the engine start sequence, which resulted in the helicopter sliding on a steel deck and impacting a crane. Contributing to the accident was the absence of traction material on the helicopter…
- [NTSB ERA14CA055](https://openairdocs.org/ntsb/ERA14CA055.md): Robinson Helicopter R44 II · Tunica, MS · Accident · No injuries · Data collection · Final report · Nov 28, 2013 · N44DQ · Substantial damage
  > The student pilot's failure to maintain control of the helicopter during the attempted takeoff, and the flight instructor's inadequate supervision of the student pilot.
- [NTSB WPR13LA217](https://openairdocs.org/ntsb/WPR13LA217.md): Robinson R44 II · Pomeroy, WA · Accident · No injuries · Limited investigation · Final report · May 2, 2013 · N442RN · Substantial damage
  > The pilot's failure to ensure that the helicopter was properly loaded, which resulted in the helicopter being in excess of its maximum allowable gross weight and led to a loss of main rotor rpm on takeoff. Contributing to the accident were the ground…
- [NTSB CEN13CA053](https://openairdocs.org/ntsb/CEN13CA053.md): Robinson Helicopter R44 II · Bryan, TX · Accident · No injuries · Data collection · Final report · Nov 6, 2012 · N131AA · Substantial damage
  > The pilot’s over-correction in an attempt to stabilize the helicopter during liftoff.
- [NTSB CEN11CA126](https://openairdocs.org/ntsb/CEN11CA126.md): Robinson Helicopter R44 II · Hemphill, TX · Accident · Minor injuries · Data collection · Final report · Dec 22, 2010 · N841SA · Substantial damage
  > The student pilot’s improper decision to carry an unauthorized passenger and the passenger’s loss of control of the helicopter during take-off.
- [NTSB WPR10LA354](https://openairdocs.org/ntsb/WPR10LA354.md): Robinson Helicopter R44 II · Salt Lake City, UT · Accident · 1 fatal · Limited investigation · Final report · Jul 16, 2010 · N944DW · Substantial damage
  > The pilot's loss of directional control while attempting to move the helicopter laterally without first lifting it fully off its landing platform.

## 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 ('7640122', '7640123')
    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" = '230' 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/230/sequence?model=7640122

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