# NTSB investigations: Bell 47G-5: Loss of engine power(total) - 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 LAX03LA226](https://openairdocs.org/ntsb/LAX03LA226.md): Bell 47 G5 · Salinas, CA · Accident · No injuries · Limited investigation · Final report · Jul 6, 2003 · N7938J · Substantial damage
  > The failure of a piston connecting rod during an aerial application, which resulted in a total loss of engine power and subsequent forced landing.
- [NTSB CHI97LA004](https://openairdocs.org/ntsb/CHI97LA004.md): Bell 47G-5 · Nunda, SD · Accident · No injuries · Limited investigation · Final report · Oct 6, 1996 · N7925J · Substantial damage
  > failure of maintenance personnel to properly torque the six accessory drive bolts, which resulted in fatigue failure of the undertorqued bolts.
- [NTSB CHI93DEP05](https://openairdocs.org/ntsb/CHI93DEP05.md): Bell 47-G5 · Fulton, WI · Accident · Minor injuries · Final report · Aug 25, 1993 · N1464W · Substantial damage
  > the failure (fracture) of the number one cylinder intake valve retainer (keeper).
- [NTSB NYC84FGM05](https://openairdocs.org/ntsb/NYC84FGM05.md): Bell 47G-5 · Penn Run, PA · Accident · No injuries · Final report · Jul 4, 1984 · N1477W · Substantial damage
  > The plt was spraying a potatoe field with a lightly loaded helicopter when the eng failed. At that time, the helicopter was about 10 ft AGL in a slight right turn & at aprx 35 mph. The plt flared to stop the forward movement & landed, but the tail rotor…
- [NTSB LAX83FUA03](https://openairdocs.org/ntsb/LAX83FUA03.md): Bell 47G-5 · Irvine, CA · Accident · No injuries · Final report · Feb 10, 1983 · N1375X · Substantial damage
  > The helicopter landed hard in a field off the airport following an engine power loss. The acfr had lifted off and only traveled about 50 feet at 15 feet AGL when the power loss occurred. An engine teardown revealed that the rings on 3 cylinders had not seated…

## 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 ('1181032')
    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" = 351))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1181032&occurrence=351

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