# Major NTSB investigations: Dehavilland DHC-6 TWIN OTTER

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 CHI06FA210](https://openairdocs.org/ntsb/CHI06FA210.md): de Havilland DHC-6-100 · Sullivan, MO · Accident · 6 fatal · Class 1 · Field · Final report · Jul 29, 2006 · N203E · Substantial damage
  > the pilot's failure to maintain airspeed following a loss of power in the right engine due to the fracturing of compressor turbine blades for undetermined reasons. Contributing to some parachutists' injuries was the lack of a more effective restraint system…
- [NTSB LAX92MA183](https://openairdocs.org/ntsb/LAX92MA183.md): de Havilland DHC-6-200 · Perris, CA · Accident · 16 fatal · Major investigation · Final report · Apr 22, 1992 · N141PV · Destroyed
  > The pilot-in-command's inadvertent feathering of the wrong propeller following an engine power loss, and the failure of the operator to assure that the pilot was provided with adequate training in the airplane. Factors related to the accident were: water…
- [NTSB DCA89MA076](https://openairdocs.org/ntsb/DCA89MA076.md): de Havilland DHC-6-300 · Grand Canyon, AZ · Accident · 10 fatal · Class 1 · Major · Final report · Sep 27, 1989 · N75GC · Destroyed
  > Improper pilot techniques and crew coordination during the landing attempt, bounce, and attempted go-around.
- [NTSB DCA86AA028](https://openairdocs.org/ntsb/DCA86AA028.md): de Havilland DHC-6-300 · Grand Canyon, AZ · Accident · 25 fatal · Final report · Jun 18, 1986 · N76GC · 2 aircraft · Destroyed
  > At about 0933 MST, Dehavilland DHC-6, N76GC, (owned & operated by Canyon airlines) & bell 206B, N6TC, (operated by heliteck) collided while on sightseeing flts over the Grand Canyon national park. After colliding in flt, both acft crashed & burned in the…
- [NTSB DCA83AA017](https://openairdocs.org/ntsb/DCA83AA017.md): de Havilland DHC-6-300 · Hailey, ID · Accident · Serious injuries · Final report · Feb 15, 1983 · N361V · Destroyed
  > The acft was less than 2 miles from the arpt of intended landing during the approach when the crew experienced a loss ofelevator control. The acft started diving toward the ground when the power was reduced. The plt applied full power to try and restore level…
- [NTSB DCA82AA022](https://openairdocs.org/ntsb/DCA82AA022.md): de Havilland DHC-6-200 · Hooper Bay, AK · Accident · Serious injuries · Final report · May 16, 1982 · N103AQ · Destroyed
  > At 0833 adt, the acft departed bethel, AK on a scheduled pax/cargo commuter flt to chevak, scammon bay & Hooper Bay, AK. The operator's commuter flts had not landed at scammon bay for svrl days since the rwy was soft & muddy from meltingsnow. Bfr departing…
- [NTSB DCA79AA019](https://openairdocs.org/ntsb/DCA79AA019.md): Dehavilland DHC-6 · Hyannis, MA · Accident · 1 fatal · Closed · Jun 17, 1979 · N383EX · Destroyed
- [NTSB DCA79AA003](https://openairdocs.org/ntsb/DCA79AA003.md): Dehavilland DHC-6 · Steamboat Spgs, CO · Accident · 2 fatal · Closed · Dec 4, 1978 · N25RM · Destroyed
- [NTSB DCA77AA026](https://openairdocs.org/ntsb/DCA77AA026.md): Dehavilland DHC-6 · Iliamna, AK · Accident · 13 fatal · Closed · Sep 6, 1977 · N563MA · 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.board_report_url IS NOT NULL OR c."investigationClass" = 'Class 1' OR c."caseType" = 'Major - Launch')
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2802606'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?major=1&model=2802606

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