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NTSB investigations: Allison 250-C20 series, 2001

13 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

19732026

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Latest 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\") = 2001
    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.

NTSB DEN02GA016Accident · 3 fatalFinal reportHughes 369E · Park City, UTthe pilot's inadequate visual lookout, resulting in an inflight collision with powerlines. Contributing factors were the fog and the powerlines.Dec 27, 2001 · N280SP · DestroyedNTSB ATL02TA021Accident · No injuriesFinal reportBell 206 · Awendaw, SCThe pilot's failure to maintain clearance from the bambi bucket suspension assembly during dip operation.Dec 21, 2001 · N206HE · Substantial damageNTSB DEN02LA013Accident · Serious injuriesLimited investigationFinal reportBell 206B · Bryce, UTloss of engine power for reasons undetermined. Contributing factors were the low airspeed and altitude at which to perform an autorotation.Dec 1, 2001 · N911KH · Substantial damageNTSB SEA02FA008Accident · 3 fatalField investigationFinal reportBell 206L · Anchorage, AKThe pilot's failure to maintain clearance from the surface of an open body of water while intentionally attempting to maintain a very low altitude while in cruise flight. Factors include falling snow, low ceilings, whiteout/greyout conditions, and flat/glassy…Oct 18, 2001 · N400EH · Substantial damageNTSB LAX01FA306Accident · Minor injuriesField investigationFinal reportBell 206B · Hilo, HIThe failure of the mechanic to secure the No. 8 bearing thrust nut during maintenance work, which resulted in the total failure of the first stage turbine wheel shaft. Also causal was his misjudgment of his height during the flare resulting in a hard landing.…Sep 30, 2001 · N206KS · DestroyedNTSB CHI01LA327Accident · Minor injuriesLimited investigationFinal reportBell 206B-III · Park Rapids, MNThe pilot not maintaining altitude/clearance when he maneuvered above the glassy lake. A factor to the accident was the glassy lake condition.Sep 27, 2001 · N56MC · Substantial damageNTSB LAX01LA305Accident · No injuriesLimited investigationFinal reportHughes 369D · Carlsbad, CAA hard landing due to the dual student's failure to maintain main rotor speed, his improper landing flare, and the flight control interference by the flight instructor.Sep 23, 2001 · N268ST · Substantial damageNTSB MIA01TA194Accident · Minor injuriesFinal reportBell 206B-III · Jacksonville, FLthe pilot's failure to recognize and correct for unanticipated right yaw/loss of tail rotor effectiveness (LTE) during an approach to hover at a low altitude, which resulted in a loss of control and the helicopter descending and colliding with a house and the…Jul 25, 2001 · N313JP · DestroyedNTSB LAX01IA262Incident · No injuriesIncident investigationFinal reportMdhi 520N · Los Angeles, CAthe excitation of the first bending mode natural frequency of the aft tube assembly that is installed through the rotating NOTAR fan drive system. Contributing factors to the incident included the operator's maintenance practice of hand-sanding the pitch…Jul 25, 2001 · N953SD · Minor damageNTSB NYC01LA179Accident · No injuriesLimited investigationFinal reportMcDonnell Douglas 369E · Niagara Falls, NYThe right skid getting snagged on the helicopter-dolly resulting in dynamic rollover.Jul 19, 2001 · N577DB · Substantial damageNTSB SEA01LA082Accident · No injuriesLimited investigationFinal reportSchweizer 269D · Nampa, IDthe pilot's inadequate compensation for strong, gusty, shifting winds while hovering in ground effect. Factors include a sudden directional change and increase in velocity of the gusty wind conditions.May 3, 2001 · N2061D · Substantial damageNTSB IAD01TA051Accident · Minor injuriesFinal reportHughes 369D · Taylorsville, KYthe flight instructor's inadequate aircraft control during a practice autorotation which resulted in a hard landing.Apr 29, 2001 · N50AP · Substantial damageNTSB CHI01LA119Accident · Minor injuriesLimited investigationFinal reportHughes 369D · Du Quoin, ILloss of engine power for undetermined reasons, the pilot operating the helicopter outside of the height-velocity curve, and the pilot's failure to maintain control of the helicopter during the emergency landing. Factors relating to the accident were the…Apr 18, 2001 · N713HT · Destroyed