# NTSB investigations, AK: Settling with power/vortex ring state

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 ANC25LA099](https://openairdocs.org/ntsb/ANC25LA099.md): Robinson Helicopter R44 II · Petersville, AK · Accident · No injuries · Class 4 · Limited · Final report · Aug 29, 2025 · N74435 · Substantial damage
  > The pilot’s exceedance of the helicopter’s available power while landing in a remote confined area, which resulted in rotor droop and a hard landing.
- [NTSB GAA19CA345](https://openairdocs.org/ntsb/GAA19CA345.md): S M & T UH · Northway, AK · Accident · Serious injuries · Data collection · Final report · Jun 10, 2019 · N64771 · Substantial damage
  > The pilot's failure to maintain a proper descent rate during landing, which resulted in impact with terrain.
- [NTSB ANC14CA042](https://openairdocs.org/ntsb/ANC14CA042.md): Robinson Helicopter R44 II · Coldfoot, AK · Accident · No injuries · Data collection · Final report · Jun 18, 2014 · N74713 · Substantial damage
  > The pilot's failure to maintain adequate main rotor rpm while maneuvering at a low altitude, which resulted in an emergency landing on uneven terrain.
- [NTSB ANC08LA076](https://openairdocs.org/ntsb/ANC08LA076.md): Eurocopter AS-350 BA · Chickaloon, AK · Accident · No injuries · Limited investigation · Final report · Jun 23, 2008 · N357CH · Substantial damage
  > The pilot's incorrect actions during an out-of ground-effect hover, which resulted in the helicopter entering a main rotor ring vortex state, and a settling with power condition, producing an excessive descent rate and collision with terrain.

## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '244' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/244/sequence?state=AK

---
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.