# NTSB investigations: Robinson Helicopter R44 II: Loss of control - in flight

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 SEA07FA223](https://openairdocs.org/ntsb/SEA07FA223.md): Robinson R44 II · Easton, WA · Accident · 4 fatal · Field investigation · Final report · Aug 2, 2007 · N7531D · Destroyed
  > The pilot's improper planning/decision in attempting a downwind takeoff under high density altitude conditions that resulted in a loss of control and impact with terrain. Contributing to the accident were the helicopter's gross weight in excess of the maximum…
- [NTSB CHI07FA114](https://openairdocs.org/ntsb/CHI07FA114.md): Robinson Helicopter R44 II · Bass Lake, IN · Accident · 2 fatal · Field investigation · Final report · Apr 23, 2007 · N382BT · Substantial damage
  > The pilot's failure to maintain a proper approach glidepath, which resulted in a settling-with-power flight condition. Contributing to the accident was the dark night light condition.
- [NTSB MIA07CA107](https://openairdocs.org/ntsb/MIA07CA107.md): Robinson R-44-II · Isla Grande, PR · Accident · No injuries · Data collection · Final report · Mar 16, 2007 · N72PK · Substantial damage
  > The pilot's inadvertent encounter with a loss of tail rotor effectiveness which resulted in damage to the helicopter during the subsequent hard landing.
- [NTSB ATL07CA046](https://openairdocs.org/ntsb/ATL07CA046.md): Robinson R-44 · Covington, GA · Accident · Serious injuries · Data collection · Final report · Feb 26, 2007 · N448BP · Substantial damage
  > The student pilot's failure to maintain control of the helicopter during liftoff, which resulted in an in-flight collision with the ground.
- [NTSB LAX06FA104](https://openairdocs.org/ntsb/LAX06FA104.md): Robinson R44 II · Minden, NV · Accident · 1 fatal · Field investigation · Final report · Feb 7, 2006 · N447SH · Substantial damage
  > The divergence of the main rotor from its normal plane of rotation for an undetermined reason, which resulted in main rotor/tail boom contact and loss of control.
- [NTSB DFW05CA250](https://openairdocs.org/ntsb/DFW05CA250.md): Robinson R44 · Batesville, TX · Accident · No injuries · Data collection · Final report · Sep 21, 2005 · N748BP · Substantial damage
  > The pilot's failure to maintain rotor rpm and his subsequent encounter with settling with power.
- [NTSB DEN05CA138](https://openairdocs.org/ntsb/DEN05CA138.md): Robinson R44 II · Jackson, WY · Accident · No injuries · Data collection · Final report · Sep 9, 2005 · N944U · Substantial damage
  > the pilot's failure to maintain aircraft control during initial takeoff climb resulting in an uncontrolled descent and impact with terrain. A contributing factor was the pilot's encounter in settling with power.
- [NTSB DEN05CA097](https://openairdocs.org/ntsb/DEN05CA097.md): Robinson R44 II · Indianola, UT · Accident · No injuries · Data collection · Final report · Jun 26, 2005 · N373DM · Substantial damage
  > The pilot's failure to maintain adequate rotor rpm which resulted in a loss of control and a hard landing.
- [NTSB CHI03FA181](https://openairdocs.org/ntsb/CHI03FA181.md): Robinson R44 II · Coleta, IL · Accident · 3 fatal · Field investigation · Final report · Jun 25, 2003 · N7512P · Destroyed
  > The pilot not maintaining main rotor RPM during cruise flight. The factor in the two passenger's fatal injuries was the pilot not following directives concerning the prohibition of carrying passengers while a student pilot. Other factors were the pilot's use…

## 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_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=7640122&occurrence=250

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