NTSB investigations: Allison 250-C47 series, CA
9 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 per year
| 1999 | 1 |
|---|---|
| 2001 | 2 |
| 2002 | 1 |
| 2009 | 1 |
| 2014 | 1 |
| 2015 | 1 |
| 2020 | 1 |
| 2022 | 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\" = 'CA' 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 ('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."eventStateOrRegion" = 'CA' 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 ('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 WPR22LA333Accident · Serious injuriesClass 3 · LimitedFinal reportBell 407 · Mount Baldy, CAThe pilot’s failure to ensure the throttle was properly positioned before commencing an approach to land, which resulted in a low rotor rpm condition and impact with terrain. Contributing to the accident was a worn throttle detent.NTSB WPR20LA228Accident · No injuriesClass 3 · LimitedFinal reportMd Helicopter 600 · San Andreas, CAThe failure of the output shaft of the overrunning clutch inner race due to frictional overheating of the shaft, which resulted from the failure of the output bearing’s stainless-steel grease seal.NTSB WPR16FA037Accident · 4 fatalField investigationFinal reportBell 407 · McFarland, CAThe pilot's loss of control and collision with terrain while attempting a course reversal after inadvertently entering an area of reduced visibility weather conditions. Contributing to the accident was the pilot's lack of recent experience with night time…NTSB WPR14LA173Accident · Serious injuriesLimited investigationFinal reportMcdonnell Douglas Helicopter 600N · Adelanto, CAThe commercial pilot’s improper control inputs, which resulted in a loss of helicopter control during takeoff.NTSB WPR09GA119Accident · Serious injuriesFinal reportMcdonnell Douglas Helicopter 600 · San Clemente, CAFailure of the engine’s number two bearing during cruise flight, which resulted in a loss of engine power.NTSB LAX03GA001Accident · Serious injuriesFinal reportMcDonnell Douglas 600N · Rialto, CAan engine deceleration event due to a loose HMU fuel line fitting, which was a result of inadequate maintenance procedures in the 100/300-hour inspection. Also causal was the flying pilot's and pilot-in-command's delayed recognition of the power loss, as well…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 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.