NTSB investigations: Allison 250-C20 series, 2004
15 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 | 2 |
|---|---|
| 1974 | 1 |
| 1975 | 2 |
| 1978 | 1 |
| 1979 | 3 |
| 1980 | 3 |
| 1981 | 5 |
| 1982 | 2 |
| 1983 | 2 |
| 1984 | 7 |
| 1985 | 6 |
| 1986 | 6 |
| 1987 | 6 |
| 1988 | 5 |
| 1989 | 7 |
| 1990 | 6 |
| 1991 | 5 |
| 1992 | 9 |
| 1993 | 7 |
| 1994 | 13 |
| 1995 | 10 |
| 1996 | 10 |
| 1997 | 10 |
| 1998 | 4 |
| 1999 | 16 |
| 2000 | 13 |
| 2001 | 13 |
| 2002 | 14 |
| 2003 | 19 |
| 2004 | 15 |
| 2005 | 14 |
| 2006 | 12 |
| 2007 | 19 |
| 2008 | 5 |
| 2009 | 10 |
| 2010 | 4 |
| 2011 | 4 |
| 2012 | 6 |
| 2013 | 9 |
| 2014 | 11 |
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 9 |
| 2018 | 10 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 3 |
| 2024 | 5 |
| 2026 | 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 year(c.\"eventDate\") = 2004
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 year(c."eventDate") = 2004
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 DFW05FA032Accident · Serious injuriesField investigationFinal reportHughes 369D · Zachary, LAThe loss of engine power as a result of fatigue cracking of the compressor adaptor coupling initiated by fretting on the pilot diameter and subsequent disconnection of the compressor from the turbine assembly. A contributing factor was the low operating…NTSB DEN05LA024Accident · No injuriesLimited investigationFinal reportBell 206B3 · Eureka, UTthe pilot's improper in-flight planning and decision making and failure to maintain obstacle clearance, resulting in contact with a power transmission line. Contributing factors include the intentional low-level maneuver, the power transmission line, and the…NTSB MIA05FA008Accident · 3 fatalField investigationFinal reportEurocopter Deutschland BO-105 CBS5 · Santa Rosa Bch, FLThe pilot's spatial disorientation and in-flight loss of control of the helicopter after encountering night instrument meteorological conditions resulting in collision with water during the resultant uncontrolled descent. A factor in the accident was the…NTSB MIA04LA132Accident · No injuriesLimited investigationFinal reportBell 206L · Gulf of MexicoA loss of engine power for undetermined reasons while on short final to land on an oil platform in the Gulf of Mexico, which resulted in the pilot ditching the helicopter into the water.NTSB MIA04LA129Accident · Minor injuriesLimited investigationFinal reportBell 206B3 · Starkville, MSThe operator's inadequate maintenance inspections and the pilot's inadequate preflight inspection, which resulted in the helicopter being operated with a contaminated fuel system, that resulted in fuel starvation, and the loss of engine power.NTSB FTW04TA237Accident · 1 fatalFinal reportBell OH-58C · Beaumont, TX**This probable cause was modified on 2/22/2016. Please see the public docket for this accident for additional details.** The pilot's failure to maintain a safe altitude, resulting in collision with the water. A factor was the dark night.NTSB ATL04LA181Accident · Minor injuriesLimited investigationFinal reportHughes HU-369-D · Waynesboro, GAThe tail rotor assembly failed due to a fatigue fracture of the input gearshaft in the tail rotor gearbox assembly, which resulted in a loss of tail rotor control and subsequent collision with trees.NTSB SEA04LA181Accident · No injuriesLimited investigationFinal reportHughes 369D · Cottage Grove, ORIn-flight loss of engine power during cruise for undetermined reasons.NTSB MIA04LA123Accident · No injuriesLimited investigationFinal reportBell 206B3 · Panama City, FLInadequate maintenance inspection resulting in the partial loss of engine power due to a loose pneumatic line on the governor and ditching of the helicopter.NTSB MIA04LA121Accident · Minor injuriesLimited investigationFinal reportMcDonnell Douglas 369E · Ochopee, FLThe pilot's loss of control in flight for undetermined reasons, which resulted in an uncontrolled descent, and subsequent impact with trees and the terrain.NTSB SEA04TA163Accident · 1 fatalFinal reportBell 206B · Mead, WAThe reversal of the reel machine during a sock line pull which resulted in a loss of control while hovering out of ground effect. Factors were the failure of company management to develop adequate procedures for conducting sock line pulls, the inadequate…NTSB LAX04CA315Accident · Minor injuriesData collectionFinal reportBell 206B · Kahului, HIthe pilot's inadequate compensation for the gusty crosswind conditions, which resulted in a dynamic rollover. Contributing factors were the direct crosswind and his lack of total experience in the accident helicopter make and model.NTSB FTW04LA197Accident · Minor injuriesLimited investigationFinal reportBell 206B · East Cameron 13The loss of engine power due to fuel exhaustion. Contributing factors were the fuel quantity gauge's improper fuel level indication, missing instrument placard, company maintenance personnel's improper maintenance records, disregard for company procedures,…NTSB FTW04GA076Accident · Minor injuriesFinal reportSchweizer 269D · San Antonio, TXThe loss of engine power due to the axial movement of the compressor rotor blades contacting the compressor vanes resulting in a subsequent compressor stall. A contributing factor was the improper assembly of the compressor section during the engine overhaul…NTSB FTW04TA075Accident · Minor injuriesFinal reportBell 206B · Decatur, TXThe pilot's failure to maintain control of the helicopter during liftoff after encountering dynamic rollover. A contributing factor was the rough and uneven terrain.