NTSB investigations: Allison 250-C20 series, TX
29 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
| 1984 | 1 |
|---|---|
| 1985 | 1 |
| 1992 | 1 |
| 1993 | 1 |
| 1994 | 1 |
| 1995 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2002 | 2 |
| 2003 | 6 |
| 2004 | 3 |
| 2005 | 3 |
| 2014 | 1 |
| 2015 | 1 |
| 2017 | 1 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 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\" = 'TX' 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" = 'TX' 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 CEN24LA377Accident · No injuriesClass 4 · LimitedFinal reportMcdonnell Douglas Helicopter 369E · Manvel, TXThe pilot’s improper recovery from a practice autorotation which resulted in a hard landing. Contributing to the accident was the instructor’s inadequate supervision of the pilot receiving instruction.NTSB CEN23LA404Accident · No injuriesClass 4 · LimitedFinal reportMcdonnell Douglas Helicopter 369E · Arcola, TXThe instructor’s failure to re-apply engine power during a power recovery after a practice autorotation which resulted in a hard landing.NTSB CEN22FA086Accident · 2 fatalClass 3 · FieldFinal reportBell 206B · Livingston, TXThe pilot exceeding the yaw control capability of the helicopter for the flight conditions, resulting in a non-mechanical loss of tail rotor effectiveness.NTSB CEN17FA100Accident · 1 fatalField investigationFinal reportBell 206B · Galveston, TXThe pilot's failure to recognize the flight had encountered instrument meteorological conditions at night, which resulted in an unrecognized descent and collision with water.NTSB CEN15LA423Accident · Serious injuriesLimited investigationFinal reportBell 206B · Woodville, TXThe loss of engine power due to water contamination in the fuel system. Contributing to the accident were the pilot’s inadequate preflight inspection of the fuel tanks and the operator’s inadequate inspection of the fuel supply truck that did not detect water…NTSB CEN14LA296Accident · Minor injuriesLimited investigationFinal reportBell 206B · Decatur, TXThe flight instructor’s improper recovery from a practice autorotation, which resulted in a hard landing.NTSB DFW05CA172Accident · Serious injuriesData collectionFinal reportGarlick Helicopters OH-58A+ · Graham, TXThe pilot's failure to maintain clearance with the wire while maneuvering during an aerial application flight. Low altitude flight is a contributing factor.NTSB DFW05FA086Accident · 3 fatalField investigationFinal reportBell 206B-3 · Shelbyville, TXThe pilot's failure to maintain altitude and clearance for undetermined reasons.NTSB DFW05TA056Accident · Minor injuriesFinal reportSchweizer 269D · San Antonio, TXThe inadequate supervision and delayed remedial action by the flight instructor, which resulted in an inadvertent dynamic rollover.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 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.NTSB FTW03LA197Accident · Minor injuriesLimited investigationFinal reportBell 206B · Mason, TXThe pilot's failure to maintain clearance with the power line. A contributing factor was the sunglare.NTSB LAX03LA183Accident · Minor injuriesLimited investigationFinal reportBell 206B · Malone, TXa fuel starvation induced loss of engine power due to fuel contamination.NTSB FTW03LA147Accident · No injuriesLimited investigationFinal reportBell 206B · Hurst, TXThe improper flare by the pilot receiving instruction, which resulted in the hard landing. A contributing factor was the flight instructor's inadequate supervision.NTSB FTW03LA134Accident · No injuriesLimited investigationFinal reportHughes 369HS · Conroe, TXThe pilot's inability to control the helicopter after encountering loss of tail rotor effectiveness. A contributing factor was the unfavorable winds.NTSB FTW03FA118Accident · 2 fatalField investigationFinal reportBell 407 · Broadus, TXThe partial loss of engine power due to erratic fuel flow metering to the engine resulting from the single point failure of the PLA potentiometer in the hydro-mechanical fuel control unit. A contributing factor was the lack of suitable terrain to execute a…NTSB FTW03LA080Accident · Serious injuriesLimited investigationFinal reportBell 206B · Putnam, TXthe pilot's failure to properly interpret and confirm a faulty tachometer instrument indication and his improper flare during the ensuing precautionary autorotation, which resulted in a hard landing. Also causal was the failure of the tachometer.NTSB FTW02LA143Accident · Serious injuriesLimited investigationFinal reportBell 206B · Rosenberg, TXThe pilot's failure to maintain terrain clearance.NTSB FTW02LA117Accident · Minor injuriesLimited investigationFinal reportBell 206B · Walnut Hill, TXThe loss of engine power as a result of the backing off of the PC air line "B" nut due to the improper installation by the company maintenance personnel. Contributing factors were the inadequate preflight by the pilot and the lack of suitable terrain for the…NTSB FTW00FA091Accident · 4 fatalField investigationFinal reportEurocopter BO105S-CBS-5 · Dalhart, TXThe pilot's failure to maintain control of the helicopter as a result of his continued flight into known adverse weather conditions. Factors were the dark night light condition, fog, low ceiling, and the pilot's lack of total instrument flight time.NTSB FTW99LA076Accident · Minor injuriesLimited investigationFinal reportBell 206-B3 · Sabine Pass, TXThe pilot's inadvertent flight into instrument meteorological conditions and subsequent spatial disorientation. Factors were the dark night conditions, the fog, and the pilot's failure to obtain a weather briefing prior to the flight.NTSB FTW98LA235Accident · No injuriesLimited investigationFinal reportBell 206BIII · Hurst, TXThe pilot's delayed recovery from a simulated autorotative landing.NTSB FTW96FA028Accident · 2 fatalField investigationFinal reportMbb BO-105S · League City, TXthe pilot's failure to maintain aircraft control. Factors were the pilot's lack of total experience in the MBB BO-105 helicopter and the dark night light conditions.NTSB FTW94LA061Accident · Serious injuriesLimited investigationFinal reportHughes 369HS · Mason, TXLoss of aircraft control for an undetermined reason.NTSB FTW93TA#03Accident · No injuriesFinal reportBell 206B · Dallas, TXNTSB FTW92GA080Accident · No injuriesFinal reportBell 206B III · Falfurrias, TXThe pilot's failure to maintain directional control due to his ability to maintain an adequate visual lookout being restricted. Factors were the observer's delay in informing the pilot of the rearward drift and the dark night conditions.NTSB FTW85LA315Accident · Minor injuriesLimited investigationFinal reportBell 206B · Damon, TXThe plt experienced an eng deceleration to flt idle while cruising 1000 MSL. He autorotated into trees in a heavily wooded area. A subsequent eng disassembly and examination revealed the pwr control line, p/n 6848471-B, was broken at its attaching 'b' nut…NTSB FTW84LA314Accident · No injuriesLimited investigationFinal reportAerospatiale AS-355F · El Paso, TXThe helicopter encountered turbulence and downdrafts during landing. The acft impacted the asphalt ramp slightly nose low and bounced 2-3 ft into the air. The nose dipped more and full aft cyclic was applied. The main rotor blades hit the ground and the acft…