# NTSB investigations: Bell 47G-3B-1, MN

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 CEN13FA357](https://openairdocs.org/ntsb/CEN13FA357.md): Bell 47G-3B-1 · Maplewood, MN · Accident · 1 fatal · Field investigation · Final report · Jun 19, 2013 · N5024N · Destroyed
  > The loss of helicopter control for reasons that could not be determined because an examination of the helicopter and its systems revealed no malfunctions or failures that would have precluded normal operation.
- [NTSB CEN11LA370](https://openairdocs.org/ntsb/CEN11LA370.md): Bell 47G-3B-1 · Lakeville, MN · Accident · Serious injuries · Limited investigation · Final report · May 25, 2011 · N96SH · Substantial damage
  > The loss of engine power due to a loose B-nut on the compressor discharge pressure bleed line.
- [NTSB CHI98LA198](https://openairdocs.org/ntsb/CHI98LA198.md): Bell 47G · Le Center, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 10, 1998 · N73284 · Destroyed
  > the pilot's failure to maintain clearance with the wire. A factor associated with the accident was the wire which the helicopter contacted.
- [NTSB CHI94T#A04](https://openairdocs.org/ntsb/CHI94T%23A04.md): Bell 47G3B1 · Medina, MN · Accident · No injuries · Final report · Jun 10, 1994 · N73998 · Substantial damage
- [NTSB CHI91DER13](https://openairdocs.org/ntsb/CHI91DER13.md): Bell 47G-3B-1 · Maple Grove, MN · Accident · No injuries · Final report · Aug 9, 1991 · N73998 · Substantial damage
  > The pilot's failure to maintain directional control of the helicopter during the forced landing. Related factors are the loss of engine power, loss of rotor RPM, the eroded compressor blades, the pilot's operation with known deficiencies in equipment and…
- [NTSB CHI91DER05](https://openairdocs.org/ntsb/CHI91DER05.md): Bell 47G3B1 · Lasalle, MN · Accident · No injuries · Final report · Jun 11, 1991 · N73284 · Substantial damage
  > The pilot's failure to maintain adequate clearance from the terrain. A related factor is the pilot's misjudged altitude above the crop.
- [NTSB CHI90DER03](https://openairdocs.org/ntsb/CHI90DER03.md): Bell 47G3B1 · Coon Rapids, MN · Accident · No injuries · Final report · Jul 31, 1990 · N4990H · Substantial damage
  > The pilot-in-command's inaccurate fuel consumption calculations and misjudgement of his fuel supply.
- [NTSB CHI85LA275](https://openairdocs.org/ntsb/CHI85LA275.md): Bell 47G-3B-1 · Donaldson, MN · Accident · No injuries · Limited investigation · Final report · Jul 6, 1985 · N7856S · Substantial damage
  > When the plt applied pwr to level off while entering a spray the eng did not produce sufficient pwr to stop the descent. He attempted a run on landing but the uneven terrain caused substantial damage to the helicopter. Inspection of the eng revealed the…
- [NTSB CHI84LA232](https://openairdocs.org/ntsb/CHI84LA232.md): Bell 47G · Fairfax, MN · Accident · Minor injuries · Limited investigation · Final report · Jun 13, 1984 · N501H · Substantial damage
  > The helicopter plt turned at the end of a spray run & the acft collided with a power line. He said that because of a quartering tailwind, the helicopter was in a nose high attitude & the tail rotor hit a wire. The plt was able to make an autorotation after…
- [NTSB CHI81FER60](https://openairdocs.org/ntsb/CHI81FER60.md): Bell 47G3B1 · Stewart, MN · Accident · No injuries · Closed · Aug 12, 1981 · N96671 · Substantial damage
- [NTSB MKC66A0013](https://openairdocs.org/ntsb/MKC66A0013.md): Bell 47G3B1 · Altura, MN · Accident · No injuries · Closed · Aug 26, 1965 · N73247 · Substantial damage

## 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."eventStateOrRegion" = 'MN' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181028', '118103A'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181028&state=MN

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