NTSB investigations: Allison 250-C20 series, AK
16 cases on aircraft whose registry engine model is Allison 250-C20 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1973 | 1 |
|---|---|
| 1975 | 1 |
| 1981 | 1 |
| 1982 | 1 |
| 1983 | 1 |
| 1984 | 1 |
| 1994 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 2001 | 1 |
| 2003 | 1 |
| 2005 | 1 |
| 2007 | 1 |
| 2013 | 1 |
| 2024 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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 ('03020'))
ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ANC24FA089Accident · 1 fatalClass 3 · FieldFinal reportBell 206B · King Salmon, AKThe pilot’s decision to initiate the visual flight into instrument meteorological conditions, which resulted in his spatial disorientation, failure to maintain helicopter control and subsequent impact with water.NTSB ANC13LA066Accident · Minor injuriesLimited investigationFinal reportCessna T207A · King Salmon, AKThe pilot’s inadequate visual lookout while departing from a multiple-use waterway, which resulted in a collision with a drifting boat. Contributing to the accident were the lack of visual conspicuity of the boat and the limited amount of time the boat…NTSB ANC07LA022Accident · No injuriesLimited investigationFinal reportHughes 369D · Gustavus, AKThe inadequate clearance from a tranquilized moose while hovering in ground effect, and the operator's inadequate procedures for such operations, which resulted in an in-flight collision with the moose. Factors associated with the accident were the moose, a…NTSB ANC05CA049Accident · No injuriesData collectionFinal reportBell 206B · Elim, AKThe pilot's continued flight into adverse weather conditions, and his failure to maintain adequate clearance while maneuvering, which resulted in an in-flight collision with terrain. Factors associated with the accident are flat light, whiteout conditions,…NTSB ANC03LA073Accident · Minor injuriesLimited investigationFinal reportBell 206B · Aniak, AKThe compressor discharge pressure line (Pc line) B-nut coming loose at the fuel control unit, which resulted in a total loss of engine power, and subsequent in-flight collision with trees during an autorotation. A factor associated with the accident was the…NTSB SEA02FA008Accident · 3 fatalField investigationFinal reportBell 206L · Anchorage, AKThe pilot's failure to maintain clearance from the surface of an open body of water while intentionally attempting to maintain a very low altitude while in cruise flight. Factors include falling snow, low ceilings, whiteout/greyout conditions, and flat/glassy…NTSB ANC97GA126Accident · 1 fatalFinal reportBell BH-206B · Dillingham, AKThe pilot's intentional VFR flight into instrument meteorological conditions (IMC). Factors associated with the accident are the pilot's failure to activate the cabin heating system, the lack of an operable windshield defogger, the pilot's overconfidence in…NTSB ANC96TA092Accident · No injuriesFinal reportHughes 369D · Ketchikan, AKThe pilot's failure to maintain control of the helicopter. The pilot's selection of unsuitable terrain for landing was a factor in the accident.NTSB ANC95LA115Accident · Minor injuriesLimited investigationFinal reportBell 206B · Talkeetna, AKThe inadvertent restriction of the anti-torque pedal by the pilot's foot, while the pilot (an incomplete paraplegic) was attempting to land.NTSB ANC95LA014Accident · No injuriesLimited investigationFinal reportBell 206B · Kenai, AKThe pilot's failure to follow the information in the flight manual concerning the use of the particle separator kit and deflector kit when operating in falling snow. Factors were the rough terrain in the forced landing area and no installation of the…NTSB SEA84LA134Accident · No injuriesLimited investigationFinal reportHughes 369D · Wrangell, AKThe helicopter was parked with the eng running when it was struck by another acft, a Beech C-45G. Prior to the collision, the helicopter was at a low RPM; therefore, the plt was unable to move the helicopter out of the way. The Beech acft was being taxied…NTSB ANC83FA144Accident · No injuriesField investigationFinal reportBell 206L-1 · Bettles, AKAccording to the plt, the low fuel warning light illuminated when the fuel gage was indicating 200 lbs. He reported he could see the arpt lights & elected to continue the flt. After arriving, he terminated his apch to a 30 to 50 ft hover with no forward…NTSB ANC82DA062Accident · 1 fatalFinal reportHughes 369D · Near Bornite, AKTwo workers were transported to a mine drilling site where the helicopter was landed on a man-made heli-pad. The heli-pad was an area about 50 ft long and 12 ft wide that had been cut into the side of a rocky hill. After off-loading the workers, the pilot…NTSB ANC81FA064Accident · Minor injuriesClosedHughes 369D · Tanacross, AKNTSB ANC76AA024Accident · No injuriesClosedHughes 369HS · Nome, AKNTSB ANC74AA013Accident · Serious injuriesClosedHughes 369HS · Ketchikan, AK