# NTSB investigations: Bell 47G-3B-1: Loss of engine power(partial) - mech failure/malf

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 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 MIA88FA192](https://openairdocs.org/ntsb/MIA88FA192.md): Bell 47G3B-1 · Benoit, MS · Accident · Serious injuries · Field investigation · Final report · Jun 15, 1988 · N73947 · Substantial damage
  > The plt said the engine misfired three times during takeoff and lost partial power. The helicopter settled into a rice field and the damaged spray booms became entangled. The helicopter nosed over in the high vegetation. The plt stated the engine accelerated…
- [NTSB SEA86LA105](https://openairdocs.org/ntsb/SEA86LA105.md): Bell 47G3B1 · Albany, OR · Accident · No injuries · Limited investigation · Final report · Apr 15, 1986 · N9417A · Substantial damage
  > The plt reported that after aprx 15 minutes of flt, the eng sputtered 2 or 3 times. An autorotation was performed onto rough terrain during which the tail rotor drive shaft was damaged by the main rotor blades. Post accident inspection revealed a hole in the…
- [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 SEA85LA178](https://openairdocs.org/ntsb/SEA85LA178.md): Bell 47G-3B-1 · Idaho City, ID · Accident · No injuries · Limited investigation · Final report · Jun 11, 1985 · N1333X · Substantial damage
  > While the student plt was on a x-country flt, the eng lost power after the supercharger failed. The plt stated that he was unable to maintain altitude & RPM; he subsequently made a forced landing in a heavily timbered, mountainous area.
- [NTSB DEN82FTM11](https://openairdocs.org/ntsb/DEN82FTM11.md): Bell 47G-3B-1 · Vermal, UT · Accident · Serious injuries · Final report · Apr 28, 1982 · N48217 · Substantial damage
  > The pilot stated that he experienced a partial loss of engine power during landing at an elevation of about 5280 ft MSL. The temperature was about 50 degrees fahrenheit. He applied full throttle, but the RPM decayed and the plane crash landed. A partial…

## 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 ('1181028', '118103A')
    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" = 352))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181028&occurrence=352

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