# NTSB investigations: Bell 47D1: Loss of engine power(partial) - nonmechanical

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 MIA96LA028](https://openairdocs.org/ntsb/MIA96LA028.md): Bell 47-D1 · Jasper, FL · Accident · No injuries · Limited investigation · Final report · Nov 15, 1995 · N4702S · Substantial damage
  > Improper maintenance and inspection of the carburetor system by maintenance personnel during the last annual inspection which resulted in a partial loss of engine power due to carburetor ice. Contributing to the accident were: the pilot's failure to perform…
- [NTSB MIA92LA069](https://openairdocs.org/ntsb/MIA92LA069.md): Bell 47D1 · Cross City, FL · Accident · No injuries · Limited investigation · Final report · Jan 27, 1992 · N93067 · Substantial damage
  > Partial loss of engine power due to undetermined reasons and unsuitable terrain encountered during the autorotative landing.
- [NTSB CHI84LA181](https://openairdocs.org/ntsb/CHI84LA181.md): Bell 47D-1 · Ridge Farm, IL · Accident · No injuries · Limited investigation · Final report · May 6, 1984 · N13012 · Substantial damage
  > The helicopter rolled over after a hard landing following loss of rotor RPM. The plt reported that during initial climb at about 300 ft AGL the rotor decreased about 500 RPM. He tried to regain rotor RPM until about 100 ft AGL and then tried an autorotation.…

## 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" = 354))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1180802&occurrence=354

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