# NTSB investigations: Bell 47D1: 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 LAX94LA235](https://openairdocs.org/ntsb/LAX94LA235.md): Bell 47D-1 · Chino, CA · Accident · No injuries · Limited investigation · Final report · Jun 2, 1994 · N14412 · Substantial damage
  > loss of aircraft control due to the pilot's failure to correctly configure the hydraulic system prior to takeoff.
- [NTSB FTW91LA091](https://openairdocs.org/ntsb/FTW91LA091.md): Bell 47D-1 · Peach Orchard, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1991 · N8117 · Substantial damage
  > The pilot's failure to maintain adequate main rotor RPM resulting in deteriorated helicopter performance. A factor was the tailwind condition.
- [NTSB ATL90DLQ01](https://openairdocs.org/ntsb/ATL90DLQ01.md): Bell 47D1 · Hickman, KY · Accident · No injuries · Final report · Apr 24, 1990 · N2134 · Substantial damage
  > Improper in-flight planning/decision by the pilot. The resultant tailwind was a related factor.
- [NTSB MIA90LA023](https://openairdocs.org/ntsb/MIA90LA023.md): Bell 47D1 · Loxahatchee, FL · Accident · Serious injuries · Limited investigation · Final report · Nov 2, 1989 · N93067 · Substantial damage
  > Failure of the pilot to maintain rotor RPM after pulling up from a swath run. A related factor was the presence of trees.
- [NTSB NYC89DNE01](https://openairdocs.org/ntsb/NYC89DNE01.md): Bell 47D1 · Russell, MA · Accident · 1 fatal · Final report · Dec 2, 1988 · N163B · Destroyed
  > A pilot induced low rotor RPM condition, followed by blade flapping as the main rotor blade contacted the tail of the helicopter.
- [NTSB MIA87LA145](https://openairdocs.org/ntsb/MIA87LA145.md): Bell 47G-2 · Rolling Fork, MS · Accident · No injuries · Limited investigation · Final report · Apr 25, 1987 · N202CH · Substantial damage
  > While landing downwind, at an alt of aprx 20 feet, the helicopter began to settle with power. The pilot then attempted to stop the descent, however, because of insufficient alt & airspeed, was unable. The helicopter then landed hard, rolled over, after which,…
- [NTSB MIA86LA168](https://openairdocs.org/ntsb/MIA86LA168.md): Bell 47-D1 · Panama City Bch, FL · Accident · Minor injuries · Limited investigation · Final report · May 29, 1986 · N10065 · Substantial damage
  > The pilot had intended to hover the helicopter and allow a 'clown' to touch the skids while a photographer recorded the event looking upward to give the appearance that the 'clown' was hanging from the skid. The 'clown' grabbed the left rear skid and the…
- [NTSB CHI84LA184](https://openairdocs.org/ntsb/CHI84LA184.md): Bell 47D1 · Alpena, MI · Accident · Serious injuries · Limited investigation · Final report · May 20, 1984 · N9158R · Destroyed
  > Prior to the accident, the owner/plt of the helicopter reportedly 'buzzed' a local baseball game. Shortly after that, the helicopter was observed to maneuver over a wooded area, enter a nose high attitude, then roll or bank & enter a descent into a wooded…

## 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 ('1180802')
    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=1180802&occurrence=250

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.