NTSB investigations: Allison 250-C20 series
10 cases on aircraft whose registry engine model is Allison 250-C20 series, where the defining event was Loss of engine power (total). 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
| 2008 | 2 |
|---|---|
| 2009 | 1 |
| 2010 | 1 |
| 2013 | 2 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 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.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e.\"isDefiningEvent\" AND e.\"tier2Number\" = '341'))
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 ('03020')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '341'))
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 ERA21FA130Accident · 4 fatalClass 3 · FieldFinal reportBell 206 · St Thomas, CBA total loss of engine power due to fatigue failure of two of the stage 3 compressor blades. Contributing to the failure of the compressor blades was the failure of maintenance personnel to inspect the compressor at the recommended interval for operation in…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 ERA18LA183Accident · 1 fatalLimited investigationFinal reportBell 206 · Rio Grande, PRA total loss of engine power due to oil exhaustion, which resulted in an uncontrolled descent and hard landing.NTSB ERA17LA209Accident · No injuriesLimited investigationFinal reportHughes 369 · Dennis, WVThe unporting of fuel due to the helicopter's nose-up attitude during long line operations, which resulted in fuel starvation and a total loss of engine power.NTSB WPR13GA374Accident · No injuriesFinal reportMcdonnell Douglas Helicopter 369E · Burns, ORThe total loss of engine power during cruise flight due to the separation of one of the 4th-stage turbine wheel blades due to low-cycle fatigue cracking that had progressed to high-cycle fatigue cracking, which ultimately led to the overload failure of the…NTSB ERA13LA344Accident · Minor injuriesLimited investigationFinal reportHughes 369D · Center Point, WVA total loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.NTSB WPR10CA314Accident · No injuriesData collectionFinal reportBell 206B · Rickreall, ORA total loss of engine power due to fuel exhaustion as a result of the pilot's failure to ensure that adequate fuel was aboard for the flight.NTSB ERA09LA460Accident · Serious injuriesLimited investigationFinal reportMcdonnell Douglas Helicopter 369E · Acworth, GAThe loss of engine power due to the fatigue failure of the third-stage turbine wheel airfoil.NTSB ERA09IA499Incident · No injuriesIncident investigationFinal reportMcdonnell Douglas Helicopter 369E · Allentown, PAThe fatigue failure of a blade in the second-stage turbine wheel, which resulted in a total loss of engine power.NTSB SEA08FA071Accident · Minor injuriesField investigationFinal reportMcdonnell Douglas 369E · Hilo, HIA leak in the fuel filter pressure differential switch that resulted in a loss of engine power. Contributing to the accident was uneven terrain that hindered a successful emergency landing.