# NTSB investigations: Lycoming VO-435 series, 1995

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 FTW96LA008](https://openairdocs.org/ntsb/FTW96LA008.md): Bell 47-G2 · Freer, TX · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1995 · N4423 · Substantial damage
  > the pilot's failure to maintain clearance from the power lines due to his improper takeoff technique. A factor was the helicopter induced blowing dust which impaired the pilot's visibility.
- [NTSB SEA95LA227](https://openairdocs.org/ntsb/SEA95LA227.md): Texas Helicopter OH-13E · Yakima, WA · Accident · No injuries · Limited investigation · Final report · Sep 20, 1995 · N38115 · Substantial damage
  > Fatigue failure of the bolt attaching the scissor arm assembly to the pitch control support assembly. The failure of the bolt led to a loss of collective pitch control and reduced rotor RPM.
- [NTSB ATL95LA145](https://openairdocs.org/ntsb/ATL95LA145.md): Bell 47G2 · Montrose, GA · Accident · No injuries · Limited investigation · Final report · Jul 31, 1995 · N6145C · Substantial damage
  > The pilot's inadequate preflight planning and visual lookout.
- [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 LAX95LA216](https://openairdocs.org/ntsb/LAX95LA216.md): Bell 47-G5 · Coalinga, CA · Accident · No injuries · Limited investigation · Final report · Jun 18, 1995 · N7923J · Destroyed
  > clutch slippage for undetermined reasons. A factor in the accident was the helicopter's low above ground altitude, which limited the pilot's time and ability to recover main rotor rpm.
- [NTSB LAX95LA213](https://openairdocs.org/ntsb/LAX95LA213.md): Bell 47-G2A · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Jun 18, 1995 · N73260 · Substantial damage
  > the pilot's failure to maintain adequate lateral clearance from the irrigation standpipe while applying chemicals to a field.
- [NTSB FTW95LA239](https://openairdocs.org/ntsb/FTW95LA239.md): Bell 47G-5 · Falfurrias, TX · Accident · No injuries · Limited investigation · Final report · May 30, 1995 · N1502L · Substantial damage
  > Inadvertent installation of an unapproved part (tail rotor gear/drive assembly), that became excessively worn since it did not conform to the manufacturer's specification, resulting in failure of the associated tail rotor bearing (also an unapproved part),…
- [NTSB NYC95LA100](https://openairdocs.org/ntsb/NYC95LA100.md): Bell 47G-5A · Middleboro, MA · Accident · Minor injuries · Limited investigation · Final report · May 4, 1995 · N444GW · Substantial damage
  > the pilot's failure to maintain airspeed during a low altitude aerial application turn, which resulted in inadvertent settling with power and the subsequent collision with the terrain.
- [NTSB LAX95LA138](https://openairdocs.org/ntsb/LAX95LA138.md): Bell 47 · Harmon Field · Accident · No injuries · Limited investigation · Final report · Mar 17, 1995 · N6569H · Substantial damage
  > an engine failure due to oil exhaustion from a missing oil pressure relief valve as the result of an improper maintenance inspection.

## 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 year(c."eventDate") = 1995
  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&year=1995

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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.