# NTSB investigations: Lycoming VO-435 series, AR

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 CHI03FA277](https://openairdocs.org/ntsb/CHI03FA277.md): Bell TH-13T · Light, AR · Accident · Serious injuries · Field investigation · Final report · Aug 21, 2003 · N38CD · Substantial damage
  > The total failure and seizure of the main rotor transmission while in cruise flight leading to the helicopter’s impact with terrain.
- [NTSB FTW02LA264](https://openairdocs.org/ntsb/FTW02LA264.md): Bell 47G-2 · Edmondson, AR · Accident · 1 fatal · Limited investigation · Final report · Sep 25, 2002 · N5193B · Destroyed
  > The pilot's failure to maintain clearance from the high voltage power lines.
- [NTSB FTW97LA264](https://openairdocs.org/ntsb/FTW97LA264.md): Bell 47G-3B-1 · Crossett, AR · Accident · Serious injuries · Limited investigation · Final report · Jul 13, 1997 · N83701 · Substantial damage
  > failure of maintenance personnel to perform an adequate inspection of the fuselage center frame and detect a fatigue fracture of a longeron tube on the upper left side of the center frame, which resulted in a disconnect of the tail rotor drive shaft from the…
- [NTSB FTW95LA310](https://openairdocs.org/ntsb/FTW95LA310.md): Williams Bell OH13H/Tomcat MK5A · Alicia, AR · Accident · Serious injuries · Limited investigation · Final report · Jul 21, 1995 · N3771W · Substantial damage
  > The pilot's failure to remove the refueling hose. A factor was that he diverted his attention from the refueling operation.
- [NTSB FTW93LA178](https://openairdocs.org/ntsb/FTW93LA178.md): Bell-Transworld 47G-2 · Wynne, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1993 · N9238Z · Substantial damage
  > Partial power loss due to the failure of one magneto. A factor was the lack of suitable terrain for the forced landing.
- [NTSB FTW92DPG15](https://openairdocs.org/ntsb/FTW92DPG15.md): Bell-Transworld 47G-2 · Birdeye, AR · Accident · No injuries · Final report · Aug 19, 1992 · N9238Z · Substantial damage
  > Fuel contamination. A factor was the high density altitude.
- [NTSB FTW91LA091](https://openairdocs.org/ntsb/FTW91LA091.md): Bell 47D-1 · Peach Orchard, AR · Accident · No injuries · Limited investigation · Final report · Jun 5, 1991 · N8117 · Substantial damage
  > The pilot's failure to maintain adequate main rotor RPM resulting in deteriorated helicopter performance. A factor was the tailwind condition.
- [NTSB MKC90LA144](https://openairdocs.org/ntsb/MKC90LA144.md): Bell 47D-1 · Fair Oaks, AR · Accident · Minor injuries · Limited investigation · Final report · Jul 12, 1990 · N8117 · Substantial damage
  > Tail rotor cable disengagement due to inadequate maintenance.
- [NTSB MKC88LA092](https://openairdocs.org/ntsb/MKC88LA092.md): Bell 47G-2 · Mc Dougal, AR · Accident · No injuries · Limited investigation · Final report · May 19, 1988 · N4690 · Substantial damage
  > The pilot stated that he had just begun the spraying of a rice field when one of the spray nozzles malfunctioned. As he was attempting to set the helicopter down on the ground, to work on the nozzle, the main rotor blades struck a tree. The main rotor blades…
- [NTSB FTW79DPG55](https://openairdocs.org/ntsb/FTW79DPG55.md): Bell 47G-2 · Earle, AR · Accident · No injuries · Closed · Jun 19, 1979 · N3550 · Substantial damage
- [NTSB FTW78DPG32](https://openairdocs.org/ntsb/FTW78DPG32.md): Bell OH-13E · Fisher, AR · Accident · No injuries · Closed · May 22, 1978 · N38113 · Substantial damage
- [NTSB FTW77FPG86](https://openairdocs.org/ntsb/FTW77FPG86.md): Bell 47G2H1 · Mountain View, AR · Accident · No injuries · Closed · Sep 19, 1977 · N38926 · Destroyed
- [NTSB FTW76FPG82](https://openairdocs.org/ntsb/FTW76FPG82.md): Quinn MK-5A · Corning, AR · Accident · Serious injuries · Closed · Jul 10, 1976 · N8429 · Destroyed
- [NTSB FTW75DPG68](https://openairdocs.org/ntsb/FTW75DPG68.md): Bell 47G-2 · Denmark, AR · Accident · Minor injuries · Closed · May 26, 1975 · N38926 · Substantial damage
- [NTSB FTW74FPG26](https://openairdocs.org/ntsb/FTW74FPG26.md): Bell 47G2A1 · Little Rock, AR · Accident · No injuries · Closed · Sep 29, 1973 · N73970 · Substantial damage
- [NTSB FTW74FPG23](https://openairdocs.org/ntsb/FTW74FPG23.md): Bell 47G2 · Viola, AR · Accident · Serious injuries · Closed · Sep 18, 1973 · N2870B · Substantial damage
- [NTSB FTW71DPG02](https://openairdocs.org/ntsb/FTW71DPG02.md): Bell 47G-2 · Norfork, AR · Accident · No injuries · Closed · Jul 30, 1970 · N6744D · 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."eventStateOrRegion" = 'AR' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41525&state=AR

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.