# NTSB investigations: Lycoming GO-435, AK

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 ANC19LA027](https://openairdocs.org/ntsb/ANC19LA027.md): Helio H391 · Hope, AK · Accident · No injuries · Class 3 · Limited · Final report · Jun 12, 2019 · N10CJ · Substantial damage
  > The pilot’s failure to maintain directional control during a precautionary landing, which resulted in a ground loop. Contributing to the accident was a partial loss of engine power for reasons that could not be determined.
- [NTSB ANC95LA122](https://openairdocs.org/ntsb/ANC95LA122.md): Grumman G-44 · Kodiak, AK · Accident · No injuries · Limited investigation · Final report · Aug 1, 1995 · N17481 · Substantial damage
  > Overload failure of the main landing gear wheel.
- [NTSB ANC94LA007](https://openairdocs.org/ntsb/ANC94LA007.md): Helio H-391-B · Beaver Creek, AK · Accident · No injuries · Limited investigation · Final report · Oct 8, 1993 · N173K · Substantial damage
  > The pilot's failure to maintain the required airspeed during the emergency descent as published in the pilot's manual. A factor is the loss of engine power for undetermined reasons.
- [NTSB ANC88LA139](https://openairdocs.org/ntsb/ANC88LA139.md): Cessna 180B · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Sep 11, 1988 · N3539E · Substantial damage
  > The plt rprtd that drg an aborted takeoff, the acft overran the departure end of the rwy & the left main gear failed. He said he misjudged the performance of the acft, & when he aborted, there was insufficient rwy remaining to stop. Also, he believed the hi…
- [NTSB ANC86LA159](https://openairdocs.org/ntsb/ANC86LA159.md): Cessna 180B · Clear, AK · Accident · No injuries · Limited investigation · Final report · Sep 1, 1986 · N3539E · Substantial damage
  > The plt & passenger were on a hunting trip & had selected a clearing on a brush covered hillside for a landing. The clearing had been previously used as an airstrip. While on final apch to land at dusk, the plt lost sight of the touchdown area due to darkness…
- [NTSB ANC84LA171](https://openairdocs.org/ntsb/ANC84LA171.md): Helio H-395A · Shellerbager Ps, AK · Accident · No injuries · Limited investigation · Final report · Aug 27, 1984 · N4195D · Substantial damage
  > The plt landed on a rwy that was covered with 18 to 30 inches of snow. Shortly after touchdown the acft nosed over. The plt recommended that when in doubt about landing-don't land.
- [NTSB ANC80FAA15](https://openairdocs.org/ntsb/ANC80FAA15.md): Helio Acft H-250 · Northway, AK · Accident · No injuries · Closed · Jun 28, 1980 · N173K · 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" = 'AK' 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 ('41520', '42072'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41520&state=AK

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