# NTSB investigations: Lycoming VO-435 series, AL

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 ERA15LA296](https://openairdocs.org/ntsb/ERA15LA296.md): Bell 47G 3B 1 · Camden, AL · Accident · No injuries · Limited investigation · Final report · Aug 3, 2015 · N4002G · Substantial damage
  > A failure of the helicopter's hydraulic flight control systems for reasons that could not be determined due to the fire damage, and the pilot's inability to turn off the hydraulic system to relieve control pressure.
- [NTSB ATL07LA052](https://openairdocs.org/ntsb/ATL07LA052.md): Bell 47G2A · Huntsville, AL · Accident · Minor injuries · Limited investigation · Final report · Mar 17, 2007 · N471KC · Destroyed
  > The loss of engine power due to undetermined reasons.
- [NTSB DEN06CA124](https://openairdocs.org/ntsb/DEN06CA124.md): Bell 47G-2 · Hayden, AL · Accident · No injuries · Data collection · Final report · Sep 9, 2006 · N23947 · Destroyed
  > engine fire for reasons undetermined.
- [NTSB ATL99FA132](https://openairdocs.org/ntsb/ATL99FA132.md): Continental Copters Tomcat MK5A · Heflin, AL · Accident · 2 fatal · Field investigation · Final report · Sep 16, 1999 · N9010T · 2 aircraft · Destroyed
  > The pilot of N9010T's failure to maintain visual lookout while maneuvering, resulting in a midair collision with N30899. A factor was the sun glare.
- [NTSB ATL99LA107](https://openairdocs.org/ntsb/ATL99LA107.md): Continental Copters Tomcat MK5A · Camden, AL · Accident · Minor injuries · Limited investigation · Final report · Jul 14, 1999 · N9086T · Substantial damage
  > The failure of the cyclic control rod due to an overstress separation resulting from a material defect (inadequate quality of material) by the manufacturer.
- [NTSB ATL94LA009](https://openairdocs.org/ntsb/ATL94LA009.md): Bell 47G2 · Billingsley, AL · Accident · No injuries · Limited investigation · Final report · Oct 25, 1993 · N866Z · Substantial damage
  > The pilot's improper vertical liftoff which resulted in dynamic roll-over and the main rotor's impact with the ground.
- [NTSB ATL92LA160](https://openairdocs.org/ntsb/ATL92LA160.md): Bell 47G-2 · Slocomb, AL · Accident · Serious injuries · Limited investigation · Final report · Aug 15, 1992 · N2880B · Substantial damage
  > A hard landing due to a power loss from fuel exhaustion. A factor in the accident was the lack of sustable terrain for the landing.
- [NTSB ATL90DKJ02](https://openairdocs.org/ntsb/ATL90DKJ02.md): Bell 47G2 · Wettumpka, AL · Accident · No injuries · Final report · Oct 27, 1989 · N9025 · Destroyed
  > The pilot's failure to avoid obstacles during aerial application maneuvering.
- [NTSB ATL87LA249](https://openairdocs.org/ntsb/ATL87LA249.md): Bell 47G3B1 · Enterprise, AL · Accident · No injuries · Limited investigation · Final report · Sep 6, 1987 · N38CD · Substantial damage
  > During a practice autorotation, the instructor pilot delayed in appling power to arrest the autorotative descent. The other pilot reported that the autorotation profile was was not the same as the previous successful autorotation. There were no reported…
- [NTSB ATL87LA222](https://openairdocs.org/ntsb/ATL87LA222.md): Bell 47G-2 · Huntsville, AL · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 1987 · N972B · Substantial damage
  > The helicopter impacted the water during a low-altitude turn over a river. The plt made a low pass to the south over an island at about 30 ft AGL, to show the island to the policewoman/traffic observer onboard. As he was making a climbing right turn at about…
- [NTSB MIA67A0105](https://openairdocs.org/ntsb/MIA67A0105.md): Bell 47G-2 · Foley, AL · Accident · Minor injuries · Closed · Apr 8, 1967 · N6714D · Substantial damage
- [NTSB MIA66A0003](https://openairdocs.org/ntsb/MIA66A0003.md): Bell 47G-2 · Selma, AL · Accident · Minor injuries · Closed · Jul 7, 1965 · N6714D · 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" = 'AL' 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=AL

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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.