NTSB investigations: Allison 250-C20 series, CO
9 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
| 1989 | 1 |
|---|---|
| 1994 | 1 |
| 1995 | 1 |
| 2002 | 1 |
| 2007 | 1 |
| 2010 | 1 |
| 2017 | 1 |
| 2020 | 2 |
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\" = 'CO' 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" = 'CO' 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 CEN20LA273Accident · Serious injuriesClass 3 · LimitedFinal reportAerospatiale AS355 · Rifle, COA loss of tail rotor effectiveness, the pilot’s subsequent loss of helicopter control, and collision with terrain.NTSB CEN20LA073Accident · No injuriesClass 3 · LimitedFinal reportHiller UH 12E · Dinosaur, COFailure of a S4 compressor blade due to a fatigue crack that likely initiated at a corrosion pit. Contributing to the accident was maintenance personnel’s failure to detect the corrosion pits during maintenance.NTSB CEN17LA314Accident · Serious injuriesLimited investigationFinal reportHughes 369D · Villa Grove, COThe pilot’s failure to maintain main rotor clearance from a power line tower during low-level maneuvering.NTSB CEN10CA545Accident · Serious injuriesData collectionFinal reportAerospatiale AS 355F1 · Pikes Peak, COThe helicopter's encounter with an unexpected downdraft, which resulted in a hard landing.NTSB DEN07LA132Accident · Minor injuriesLimited investigationFinal reportBell 206B · Broomfield, COThe pilot's failure to maintain control of the helicopter, resulting in an inadvertent dynamic rollover.NTSB DEN02LA036Accident · No injuriesLimited investigationFinal reportBell 206B-III · Leadville, COthe pilot's inadvertent flight into adverse weather, which resulted in a collision with terrain. A contributing factor was the downdraft.NTSB FTW95TA228Accident · No injuriesFinal reportBell 206B-III · Meeker, COFailure by the pilot to maintain control of the aircraft during landing. A factor was soft terrain.NTSB FTW94T#A01Accident · No injuriesClass 3Final reportBell 206A · Estes Park, CONTSB DEN89LA090Accident · No injuriesLimited investigationFinal reportBell 222 · Leadville, COFailure of the pilot to compensate adequately for wind conditions with rudder pedals while maneuvering in unfavorable wind and high density altitude.