# NTSB investigations: Bell 47G-4A, CA

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 WPR10LA117](https://openairdocs.org/ntsb/WPR10LA117.md): Bell 47G-4A · Shafter, CA · Accident · Minor injuries · Limited investigation · Final report · Jan 22, 2010 · N28938 · Substantial damage
  > The loss of a main rotor blade counterweight due to corrosion. Contributing to the accident was the failure of the operator to perform the initial and recurrent inspections required by a Service Bulletin to detect the corrosion in the counterweight.
- [NTSB LAX05LA187](https://openairdocs.org/ntsb/LAX05LA187.md): Bell 47G-4A · Bakersfield, CA · Accident · Serious injuries · Limited investigation · Final report · May 25, 2005 · N110DT · Destroyed
  > the pilot's inadequate visual lookout and failure to maintain clearance from the power lines.
- [NTSB LAX04LA176](https://openairdocs.org/ntsb/LAX04LA176.md): Bell 47G-4A · Bakersfield, CA · Accident · Serious injuries · Limited investigation · Final report · Apr 3, 2004 · N7NB · Substantial damage
  > a loss of tail rotor drive due to a disconnection of the drive shaft's splined coupling at the tail rotor gear box. The splined coupling to tail rotor gear box disconnection occurred as a result of tail boom flexing due to the combined effects of an…
- [NTSB LAX01LA276](https://openairdocs.org/ntsb/LAX01LA276.md): Bell 47G-4A · Strathmore, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 11, 2001 · N4262Y · Destroyed
  > The pilot's inadequate visual lookout while maneuvering during an aerial application flight.
- [NTSB LAX01LA196](https://openairdocs.org/ntsb/LAX01LA196.md): Bell 47G-4A · Buttonwillow, CA · Accident · No injuries · Limited investigation · Final report · May 31, 2001 · N110DT · Substantial damage
  > The pilot's inadequate in-flight planning that resulted in settling with power during an aerial application turn-to-reverse direction and collision with the ground. Factors were high density altitude and a wind shift.
- [NTSB LAX00LA116](https://openairdocs.org/ntsb/LAX00LA116.md): Bell 47G-4A · Wasco, CA · Accident · No injuries · Limited investigation · Final report · Mar 7, 2000 · N1354X · Substantial damage
  > The pilot's failure to use carburetor heat, which resulted in a loss of engine power. Factors included the ambient carburetor icing conditions and the lack of suitable terrain for the forced landing.
- [NTSB LAX98LA197](https://openairdocs.org/ntsb/LAX98LA197.md): Bell 47G-4A · Shafter, CA · Accident · No injuries · Limited investigation · Final report · Jun 14, 1998 · N110DT · Substantial damage
  > The aircraft's encounter with settling with power, which resulted from the pilot's decision to perform a steep downwind approach.
- [NTSB LAX93LA120](https://openairdocs.org/ntsb/LAX93LA120.md): Bell 47G · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Feb 13, 1993 · N1185W · Substantial damage
  > The clutch slippage and failure of the pilot to jettison the load.
- [NTSB LAX91LA363](https://openairdocs.org/ntsb/LAX91LA363.md): Bell 47G · Kettleman City, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 20, 1991 · N4062G · Substantial damage
  > A non-mechanical loss of engine power due to fuel exhaustion by the pilot's improper calculation of the fuel supply and subsequent hard landing.
- [NTSB LAX87DVD01](https://openairdocs.org/ntsb/LAX87DVD01.md): Bell 47G4A · Stockton, CA · Accident · Serious injuries · Final report · Feb 2, 1987 · N28938 · Substantial damage
  > Just after takeoff, the engine experienced a power loss while transporting agricultural equipment. A fractographic examination of the failed fuel disconnect fitting by anamet laboratories, concluded that approximately 70% of the retaining ring on the fuel…
- [NTSB LAX86DVA13](https://openairdocs.org/ntsb/LAX86DVA13.md): Bell 47G-4A · Shafter, CA · Accident · No injuries · Final report · Aug 8, 1986 · N1185W · Substantial damage
  > Shortly after departing the loading rig, en route to an agricultural aerial application operation, the forward coupling tail rotor drive shaft failed. The helicopter was about 10 ft above ground level and about 100 ft west of the loading rig. The pilot…
- [NTSB LAX83FA462](https://openairdocs.org/ntsb/LAX83FA462.md): Bell 47G-4G · Lodi, CA · Accident · No injuries · Field investigation · Final report · Sep 28, 1983 · N7956S · Destroyed
  > During takeoff, the helicopter lost power after climbing aprx 20 ft. the plt made an autorotative landing, but after touchdown, the helicopter slid down a river bank, rolled over & began burning. The fuel tanks did not rupture & still contained fuel. When…
- [NTSB LAX83FA087](https://openairdocs.org/ntsb/LAX83FA087.md): Bell 47G4 · Five Points, CA · Accident · Minor injuries · Field investigation · Final report · Feb 3, 1983 · N4262Y · Destroyed
  > The pilot was on his final pass of the operation. He flew under 2 sets of wires but failed to see a third set. The spray boom caught on the the wire pitching the helicopter nose down. The main rotor hit the tail boom and the helicoptercrashed into a canal.
- [NTSB LAX82DVA05](https://openairdocs.org/ntsb/LAX82DVA05.md): Bell 47G-4A · Wasco, CA · Accident · No injuries · Closed · Oct 16, 1981 · N7NB · Substantial damage
- [NTSB LAX68A0064](https://openairdocs.org/ntsb/LAX68A0064.md): Bell 47G-4A · Los Angeles, CA · Accident · Serious injuries · Closed · Jan 3, 1968 · N7821S · Destroyed

## 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" = 'CA' 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 ('1181031'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

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

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