NTSB investigations: Allison 250-C47 series
60 cases on aircraft whose registry engine model is Allison 250-C47 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, newest first
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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03029'))
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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03029'))
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 ATL02LA095Accident · No injuriesLimited investigationFinal reportMcDonnell Douglas MD-600N · Deland, FLThe pilot's failure to follow the FADEC malfunction checklist that resulted in the loss of rotor RPM, and the pilot's improper use of the flight controls during the precautionary landing that resulted in a hard landing. A factor was the malfunction of the…NTSB NYC02TA026Accident · Serious injuriesFinal reportBell 407 · Whitley City, KYThe pilots decision to operate the helicopter at an airspeed in excess of the maximum demonstrated stable airspeed for the water bucket. A factor in the accident was the pilot did not follow the published emergency procedure.NTSB LAX02IA013Incident · No injuriesIncident investigationFinal reportMcDonnell Douglas 600N · Long Beach, CAThe fatigue failure of a 5/16-inch boom attach bolt was most probably caused by the angular misalignment between the tail boom bolt hole and the fuselage mounted nutplate.NTSB LAX01FA277Accident · Minor injuriesField investigationFinal reportMD Helicopters 600N · Fountain Hills, AZthe manufacturer's pilot's failure to maintain yaw control and main rotor speed while recovering from an unusual attitude induced by the customer pilot's inadequate control inputs while maneuvering at low altitude. The manufacturer's pilot's inadequate…NTSB CHI01LA145Accident · 1 fatalLimited investigationFinal reportBell Helicopter 407 · Schoolcraft, MIThe pilot rated passenger failed to maintain clearance with the rotor blades as he exited the helicopter.NTSB FTW01FA115Accident · No injuriesField investigationFinal reportBell 407 · Vermillion 44Failure of the engine-to-transmission driveshaft coupling due to fatigue.NTSB DEN01LA060Accident · No injuriesLimited investigationFinal reportBell 407 · Jackson, WYThe pilot's failure to maintain adequate lateral and vertical clearance during landing. Factors were the clouds and snow-covered high terrain.NTSB LAX01TA092Accident · No injuriesFinal reportMcDonnell Douglas 600N · San Diego, CAThe student pilot's improper use of the rotorcraft flight controls, and the instructor pilot's inadequate supervision of the maneuver.NTSB LAX99TA115Accident · Minor injuriesFinal reportMcDonnell Douglas 600N · Rialto, CAThe pilot's improper in-flight decision to maneuver in the area while observed inclement weather approached, which led to a loss of control. Contributing factors were the low ceilings, mountainous terrain and spatial disorientation.NTSB LAX98LA093Accident · No injuriesLimited investigationFinal reportBoeing MD600N · Mesa, AZthe attempt by flight test engineers to verify a height/velocity data point that was subsequently shown to be outside the aircraft's performance capabilities.