# NTSB investigations: Lycoming VO-435 series, IN

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 CEN18FA258](https://openairdocs.org/ntsb/CEN18FA258.md): Bell 47G · Arlington, IN · Accident · 1 fatal · Field investigation · Final report · Jul 6, 2018 · N96195 · Substantial damage
  > The inflight separation of the upper transmission due to the thread failure of transmission housing attachment bolts, which were installed on the helicopter with thread damage from a prior installation.
- [NTSB CEN12CA484](https://openairdocs.org/ntsb/CEN12CA484.md): Bell 47G-2A · Austin, IN · Accident · Serious injuries · Data collection · Final report · Jul 27, 2012 · N652HA · Substantial damage
  > The pilot did not maintain clearance from terrain during a low-level aerial application flight and lost control of the helicopter.
- [NTSB CHI04CA229](https://openairdocs.org/ntsb/CHI04CA229.md): Bell 47G2 · Muncie, IN · Accident · No injuries · Data collection · Final report · Aug 14, 2004 · N96MB · Destroyed
  > The engine failure for an undetermined reason, and the pilot's inability to properly level-off for landing due to the low rotor speed, which resulted in the hard landing. The low altitude where the engine failure occurred was a factor.
- [NTSB CHI00TA306](https://openairdocs.org/ntsb/CHI00TA306.md): Bell 47G-5A · Economy, IN · Accident · Minor injuries · Final report · Sep 22, 2000 · N14841 · Substantial damage
  > The pilot failed to maintain control of the helicopter while attempting a landing on unsuitable terrain. A factor associated with the accident was the grass covered, down slope in the terrain.
- [NTSB CHI91LA245](https://openairdocs.org/ntsb/CHI91LA245.md): Hiller 1345 · Michigan City, IN · Accident · Serious injuries · Limited investigation · Final report · Aug 3, 1991 · N57972 · Substantial damage
  > Fuel exhaustion due the pilot's delay in refueling. Factors related to the accident were pressure induced by others (passenger), and the absence of suitable terrain.
- [NTSB CHI89DEX05](https://openairdocs.org/ntsb/CHI89DEX05.md): Texas Helicopter OH-13H/M74A · New Richmond, IN · Accident · No injuries · Final report · Jul 13, 1989 · N10002 · Substantial damage
  > The pilot's misjudgement of the fuel supply which resulted in fuel exhaustion.
- [NTSB CHI88DEX11](https://openairdocs.org/ntsb/CHI88DEX11.md): Continental Copters MK-5 · Redkey, IN · Accident · 1 fatal · Final report · Aug 10, 1988 · N25561 · Destroyed
  > Physical impairment of the pilot due to drugs which resulted in a misjudged approach and subsequent contact with trees during the approach to an aerial application swath run.
- [NTSB CHI88DEX08](https://openairdocs.org/ntsb/CHI88DEX08.md): Continental Copters Tomcat MK-6 · Straughn, IN · Accident · No injuries · Final report · Jul 11, 1988 · N9093T · Substantial damage
  > Aerial application helicopter struck power lines in field on first swath run. This was the first time the pilot had sprayed this field. Prior to spraying the field he questioned the farmer regarding power lines or other obstructions. The farmer replied that…
- [NTSB CHI85FA301](https://openairdocs.org/ntsb/CHI85FA301.md): Bell 47G2A1 · Brook, IN · Accident · 1 fatal · Field investigation · Final report · Jul 20, 1985 · N1345A · Destroyed
  > The helicopter contacted the terrain in a flat attitude and rolled over during an autorotative landing. A witness stated an autorotation was entered at 800 ft AGL during which the plt made a 360 deg descending turn. An application of pwr was heard at an alt…
- [NTSB CHI85FEX04](https://openairdocs.org/ntsb/CHI85FEX04.md): Texas Helicopter OH13E/M74 · Veedersburg, IN · Accident · Serious injuries · Final report · Jul 17, 1985 · N10000 · Destroyed
  > The acft was destroyed during a hard forced landing in a soybean fld following a loss of pwr. Inspection of the helicopter revealed the carburetor, fuel filter and fuel tank were void of fuel. The plt received received serious injuries during the accident and…
- [NTSB CHI76FEA35](https://openairdocs.org/ntsb/CHI76FEA35.md): Bell 47G-2 · Monticello, IN · Accident · Minor injuries · Closed · May 22, 1976 · N9238Z · Substantial damage
- [NTSB CHI74DEA13](https://openairdocs.org/ntsb/CHI74DEA13.md): Bell 47G-2A · Veedersburg, IN · Accident · No injuries · Closed · Sep 16, 1973 · N7579 · Substantial damage
- [NTSB CHI72FET06](https://openairdocs.org/ntsb/CHI72FET06.md): Bell 47G-2 · Laporte, IN · Accident · Minor injuries · Closed · Aug 18, 1971 · N2495B · 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" = 'IN' 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=IN

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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.