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Fatal NTSB investigations: Lycoming HIO-360 series

27 cases on aircraft whose registry engine model is Lycoming HIO-360 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.

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Cases per year

19792026

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Query with SQL

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."highestInjuryLevel" = 'Fatal' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41524')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

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.\"highestInjuryLevel\" = 'Fatal'
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41524'))
  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."highestInjuryLevel" = 'Fatal'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41524'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC

Run 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 WPR25FA097Accident · 2 fatalClass 3 · FieldPreliminary reportLancair 360 · Marana, AZOn February 19, 2025, about 0828 mountain standard time, a Lancair 360 Mk II, N3602M, was destroyed, and a Cessna 172S, N463ER, sustained minor damage when they were involved in a mid-air collision near Marana Regional Airport (AVQ), Marana, Arizona. The…Feb 19, 2025 · N3602M · 2 aircraft · Destroyed NTSB ERA22FA262Accident · 2 fatalClass 3 · FieldFinal reportEnstrom F28 · Greenville, OHAn impact with terrain for undetermined reasons.Jun 7, 2022 · N600TA · Substantial damage NTSB CEN16FA315Accident · 1 fatalField investigationFinal reportHughes 269C · Howe, TXThe improper execution of an autorotation following the loss of engine power, which resulted in an uncontrolled descent into terrain. Contributing to the accident was the flight instructor's lack of remedial action during the autorotation.Aug 10, 2016 · N9277R · Substantial damage NTSB CEN16FA304Accident · 1 fatalField investigationFinal reportSchweizer 269C 1 · Jeanerette, LAThe pilot's loss of helicopter control for reasons that could not be determined based on available evidence.Aug 3, 2016 · N1549W · Substantial damage NTSB WPR15FA205Accident · 2 fatalField investigationFinal reportSchweizer 269C · Newberg, ORThe loss of translation/rotational power between the engine and the transmission due to the severe wear of the forward spline portion of the lower coupling drive shaft. The reason for the severe wear of the forward spline could not be definitively determined…Jul 2, 2015 · N2096W · Destroyed NTSB ERA13LA433Accident · 1 fatalLimited investigationFinal reportEnstrom F-28C · Bloomsburg, PAThe relieved pilot’s failure to maintain clearance from the rotating main rotor blades after he exited the helicopter.Sep 27, 2013 · N631DP · Minor damage NTSB SEA08FA022Accident · 1 fatalField investigationFinal reportHughes 269C · Baker City, ORThe pilot’s failure to maintain main rotor rpm while maneuvering.Nov 8, 2007 · N381MC · Substantial damage NTSB CHI06LA138Accident · 1 fatalLimited investigationFinal reportHughes 269A · Berlin Center, OHThe pilot flew at a low altitude and failed to maintain clearance from the wire. A factor was the wire.May 28, 2006 · N69HU · Substantial damage NTSB CHI04LA015Accident · 1 fatalLimited investigationFinal reportSchweizer 269C · Fenton, MIThe intentional low altitude flight maneuvering and the ostentatious display by the pilot. The water was a factor to the accident.Oct 18, 2003 · N456JP · Substantial damage NTSB DEN03FA090Accident · 1 fatalField investigationFinal reportHughes 269C · Watkins, COfailure of both pilots to initiate a timely recovery from a practice autorotation. A contributing factor was the instructor's inadequate supervision of the pilot receiving instruction.May 28, 2003 · N9643F · Destroyed NTSB LAX03FA134Accident · 2 fatalField investigationFinal reportHughes 269B · Auburn, CAthe misjudged flare maneuver by an unknown crewmember during a likely practice autorotation that resulted in an in-flight collision with terrain.Apr 11, 2003 · N16133 · Destroyed NTSB LAX03FA060Accident · 1 fatalField investigationFinal reportSchweizer 269C · Collinsville, CAA loss of engine power for undetermined reasons, and the pilot's failure to maintain main rotor rpm during the subsequent autorotation. A factor in the accident was the unsuitable nature of the terrain for a forced landing.Jan 4, 2003 · N98TH · Destroyed NTSB CHI01FA257Accident · 2 fatalField investigationFinal reportSchweizer 269C · Waterloo, INAircraft control not maintained for undetermined reasons.Aug 5, 2001 · N6129M · Substantial damage NTSB MIA00GA121Accident · 2 fatalFinal reportHughes 269C · Del Rio, TXAn in-flight loss of control while maneuvering for undetermined reasons resulting in an in-flight collision with terrain. A factor in the accident was the in-flight loss of engine power and rotor rpm.Mar 27, 2000 · N1110N · Destroyed NTSB SEA00FA014Accident · 1 fatalField investigationFinal reportEnstrom F28C · Pendleton, ORFailure to maintain clearance from the runway surface while maneuvering at low altitude, and inadequate remedial action after the tail rotor struck the surface.Nov 2, 1999 · N635H · Destroyed NTSB SEA99FA168Accident · 1 fatalField investigationFinal reportSchweizer 269C · Westport, ORThe pilot's failure to maintain clearance from terrain. Factors include low clouds and visibility and near-night light conditions.Aug 8, 1999 · N383T · Destroyed NTSB LAX95LA332Accident · 1 fatalLimited investigationFinal reportEnstrom F-28C · Livermore, CAthe pilot's inadequate preflight fuel load determination procedures which resulted in fuel exhaustion. In addition, the pilot's delayed and improper use of the collective and cyclic flight controls following the engine failure led to his failure to maintain…Sep 10, 1995 · N5689T · Destroyed NTSB LAX93FA260Accident · 1 fatalField investigationFinal reportHughes 269A · Henderson, NVthe pilot's improper use of the collective control and his failure to maintain adequate RPM during an autorotative descent during a practice power off landing. A factor which contributed to the accident related to the pilot's lack of recent experience…Jun 19, 1993 · N9048R · Destroyed NTSB NYC93FA115Accident · 1 fatalField investigationFinal reportEnstrom F28C · Gordon, KYThe pilot's failure to see and avoid the wire.Jun 17, 1993 · N200NH · Destroyed NTSB BFO93FA019Accident · 2 fatalField investigationFinal reportHughes 269C · Tonawanda, NYImproper inflight planning/decision by the pilot and his failure to maintain clearance from an obstacle during flight. Factors related to the accident include poor visibility and weather conditions at dusk, and the pilot's excessive airspeed for the…Jan 11, 1993 · N1088Z · Destroyed NTSB SEA90LA016Accident · 1 fatalLimited investigationFinal reportHughes 269C · Estacada, ORThe pilot misjudged clearance between her external load and the obstruction. Factors related to the accident were: the obstruction, improper maintenance and modification of the external load line/hook by the operator, failure of the pilot to jettison the…Nov 15, 1989 · N9592F · Destroyed NTSB FTW89DRG06Accident · 1 fatalFinal reportHughes 269C · Rocksprings, TXThe pilot diverted his attention from operation of the helicopter, failed to maintian proper rotor RPM, and failed to maintain altitude (clearance) above the ground, while maneuvering at low altitude. A contributing factor was his impairment from use of a…May 18, 1989 · N58228 · Destroyed NTSB ATL88FA168Accident · 1 fatalField investigationFinal reportHughes 269A · Ozark, ALThree months prior to the accident a mechanic repaired the left magneto. He reinstalled it and timed it with the right magneto. Both magnetos were found to have advanced timing. Internal examination showed discrepancies which would lead to electrical…May 9, 1988 · N1038Y · Substantial damage NTSB NYC87MA024Accident · 1 fatalMajor investigationFinal reportEnstrom F-28F · Manhattan, NYThe aircraft was contracted by nbc to make daily highway traffic observations in the new york city area. The pilot and passenger, an nbc radio traffic reporter, were flying in a northerly direction along Manhattan's west side at an altitude of about 75 feet.…Oct 22, 1986 · N8617B · Destroyed NTSB DEN85FA134Accident · 1 fatalField investigationFinal reportEnstrom F-28F · Carrizozo, NMThe student pilot departed albiquerque, NM with less than full fuel tanks and a worn out eng driven fuel pump which allowed fuel to be pumped overboard. No flt plan was filed. During his VMC x-country flt, the eng failed and an unsuccessful autorotation…May 12, 1985 · N8618A · Substantial damage NTSB FTW81FA146Accident · 1 fatalClosedHughes 269C · Startzville, TXSep 21, 1981 · N8322F · Destroyed NTSB CHI80FA014Accident · 1 fatalClosedHughes 269C · West Milton, OHDec 15, 1979 · N7483F · Destroyed