# Fatal NTSB investigations: Bell 47G-4A

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 CEN10LA431](https://openairdocs.org/ntsb/CEN10LA431.md): Bell 47G-4A · Rochester, MN · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2010 · N124SH · Substantial damage
  > The total loss of engine power due to a high-cycle fatigue fracture of a first-stage compressor blade. The reason for the fracture could not be determined during postaccident examination.
- [NTSB CHI08LA211](https://openairdocs.org/ntsb/CHI08LA211.md): Bell 47G-4A · Mayville, WI · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2008 · N24HM · Minor damage
  > The pilot's failure to maintain clearance with the rotating rotor blades after he exited the helicopter after landing.
- [NTSB ATL02FA107](https://openairdocs.org/ntsb/ATL02FA107.md): Bell 47G-4A · Yauco, PR · Accident · 1 fatal · Field investigation · Final report · May 25, 2002 · N6SR · Destroyed
  > The pilot's failure to apply carburetor heat that resulted in a partial loss of engine power and the subsequent collision with an object during the forced landing. A factor was weather conditions favorable for the formation of carburetor ice.
- [NTSB LAX96LA315](https://openairdocs.org/ntsb/LAX96LA315.md): Bell 47-G4A · Guam · Accident · 1 fatal · Limited investigation · Final report · Aug 26, 1996 · N474GA · Destroyed
  > loss of tail rotor control due to improper maintenance.
- [NTSB MIA96LA210](https://openairdocs.org/ntsb/MIA96LA210.md): Bell 47G-4A · Adel, GA · Accident · 1 fatal · Limited investigation · Final report · Aug 11, 1996 · N9472G · Destroyed
  > the pilot's misjudgment of clearance between the helicopter and the antenna. A factor relating to the accident was the pilot's use of a drug (medication) that had sedative effects.
- [NTSB NYC92FA117](https://openairdocs.org/ntsb/NYC92FA117.md): Bell 47-G4A · Shelburne Falls, MA · Accident · 3 fatal · Field investigation · Final report · Jun 16, 1992 · N1041B · Destroyed
  > The pilot's failure to maintain adequate obstacle clearance. Contributing was inadequate altitude.
- [NTSB SEA81FA035](https://openairdocs.org/ntsb/SEA81FA035.md): Bell 47G-4A · Aberdeen, WA · Accident · 2 fatal · Closed · May 19, 1981 · N9457 · Destroyed
- [NTSB NYC77FA053](https://openairdocs.org/ntsb/NYC77FA053.md): Bell 47G-4A · Hartsdale, NY · Accident · 1 fatal · Closed · Apr 22, 1977 · N472FW · Destroyed
- [NTSB UNK75X0102](https://openairdocs.org/ntsb/UNK75X0102.md): Bell 47G4A · Ixiamas, St. Barthélemy · Accident · 1 fatal · Closed · Feb 16, 1975 · N1446W · Destroyed
- [NTSB SEA74AS030](https://openairdocs.org/ntsb/SEA74AS030.md): Bell 47G-4A · Wapato, WA · Accident · 1 fatal · Closed · Jan 20, 1974 · N1396X · Destroyed
- [NTSB FTW74AF016](https://openairdocs.org/ntsb/FTW74AF016.md): Bell 47G-4A · Leeville, LA · Accident · 2 fatal · Closed · Sep 18, 1973 · N4800R · Destroyed
- [NTSB FTW72AF012](https://openairdocs.org/ntsb/FTW72AF012.md): Bell 47G-4A · Port Oconner, TX · Accident · 1 fatal · Closed · Aug 31, 1971 · N1319X · Destroyed
- [NTSB ANC69A0027](https://openairdocs.org/ntsb/ANC69A0027.md): Bell 47G-4A · Kenai, AK · Accident · 1 fatal · Closed · Nov 4, 1968 · N1396X · Destroyed
- [NTSB FTW68A0030](https://openairdocs.org/ntsb/FTW68A0030.md): Bell 47G-4 · La Place, LA · Accident · 2 fatal · Closed · Sep 13, 1967 · N1350X · 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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181031'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?fatal=1&model=1181031

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