# NTSB investigations: Bell 47G-2: Loss of engine power

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 ATL07LA052](https://openairdocs.org/ntsb/ATL07LA052.md): Bell 47G2A · Huntsville, AL · Accident · Minor injuries · Limited investigation · Final report · Mar 17, 2007 · N471KC · Destroyed
  > The loss of engine power due to undetermined reasons.
- [NTSB CHI04CA229](https://openairdocs.org/ntsb/CHI04CA229.md): Bell 47G2 · Muncie, IN · Accident · No injuries · Data collection · Final report · Aug 14, 2004 · N96MB · Destroyed
  > The engine failure for an undetermined reason, and the pilot's inability to properly level-off for landing due to the low rotor speed, which resulted in the hard landing. The low altitude where the engine failure occurred was a factor.
- [NTSB CHI01LA259](https://openairdocs.org/ntsb/CHI01LA259.md): Bell 47G-2 · Blooming Prairi, MN · Accident · No injuries · Limited investigation · Final report · Aug 5, 2001 · N440TG · Substantial damage
  > The reported loss of engine power for undetermined reasons during a the cruise portion of a CFR part 137 observation, and the pilot not following the height/velocity charts data.
- [NTSB ATL01LA075](https://openairdocs.org/ntsb/ATL01LA075.md): Bell 47 · Indianola, MS · Accident · No injuries · Limited investigation · Final report · Jul 10, 2001 · N8478D · Substantial damage
  > The pilot's improper use of flight controls during an autorotation that resulted inn the collapse of the skids and cross tube assembly. A factor was the loss of engine power due to the failure of # 1 connecting rod and the overload failure of the skids and…
- [NTSB SEA99LA149](https://openairdocs.org/ntsb/SEA99LA149.md): Bell 47G-2 · Benton City, WA · Accident · 1 fatal · Limited investigation · Final report · Aug 26, 1999 · N11VH · Destroyed
  > A loss of power for undetermined reasons and the failure of the pilot to maintain adequate rotor RPM following the power loss. Contributing factors were the pilot's lack of certification and total experience.
- [NTSB MIA98LA154](https://openairdocs.org/ntsb/MIA98LA154.md): Bell 47G-2 · Fort Walton Bch, FL · Accident · Minor injuries · Limited investigation · Final report · May 9, 1998 · N6714D · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB LAX98LA001](https://openairdocs.org/ntsb/LAX98LA001.md): Bell 47G-2 · Burbank, CA · Accident · No injuries · Limited investigation · Final report · Oct 3, 1997 · N2483B · Substantial damage
  > A loss of engine power for undetermined reasons.
- [NTSB LAX85LA147](https://openairdocs.org/ntsb/LAX85LA147.md): Bell 47G-2 · Stockton, CA · Accident · Minor injuries · Limited investigation · Final report · Feb 20, 1985 · N4021A · Substantial damage
  > The eng experienced a ttl loss of pwr during cruise flt at 300-400 ft AGL. The plt performed an autorotation into a grape vineyard which resulted in substantial damage to the helicopter. Cause of the loss of pwr was not determined.

## 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 ('1181008')
    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" = 350))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181008&occurrence=350

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