NTSB investigations: Lycoming IO-540 series, MT
12 cases on aircraft whose registry engine model is Lycoming IO-540 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
| 1980 | 2 |
|---|---|
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 2 |
| 2010 | 1 |
| 2013 | 2 |
| 2017 | 2 |
| 2025 | 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\" = 'MT' 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 ('41530', '41585'))
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" = 'MT' 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 ('41530', '41585'))
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 WPR26LA020Accident · 3 fatalClass 3 · LimitedPreliminary reportPiper PA-23-250 · Condon, MTOn October 17, 2025, about 1615 mountain daylight time, a Piper PA-23-250, N2345R, was substantially damaged when it was involved in an accident near Condon, Montana. The pilot and two passengers were fatally injured. The airplane was operated as a Title 14…NTSB WPR17LA168Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Lake Sutherlin, MTThe pilot’s transition into an out-of-ground-effect hover in high-density altitude conditions that exceeded the helicopter’s performance capabilities, which resulted in loss of rotor rpm.NTSB WPR17LA143Accident · Serious injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Ronan, MTThe pilot's failure to maintain adequate airspeed, which resulted in a loss of tail rotor effectiveness during a low-altitude orbiting maneuver and a subsequent hard landing.NTSB WPR13CA403Accident · No injuriesData collectionFinal reportMaule M-7-260C · Nashua, MTThe pilot's failure to maintain clearance from a berm during the takeoff, which resulted in a loss of directional control.NTSB WPR13FA343Accident · 1 fatalField investigationFinal reportRobinson Helicopter R44 II · Thompson Falls, MTThe pilot's failure to maintain helicopter control while operating in conditions conducive to a loss of tail rotor effectiveness.NTSB CEN10LA496Accident · No injuriesLimited investigationFinal reportCessna 182T · Mosby, MTA partial loss of engine power for undetermined reasons during an en route climb.NTSB LAX08CA182Accident · Minor injuriesData collectionFinal reportRobinson R44 II · Missoula, MTThe student's inadvertent control interference, which the flight instructor was unable to overcome. A contributing factor was the instructor's poor crew coordination in his failure to verbally command the student to relinquish the controls and his inadequate…NTSB LAX08LA154Accident · 1 fatalLimited investigationFinal reportMaule MX-7-235 · Boulder, MTThe pilot's decision to continue flight at low altitude in instrument weather conditions and his failure to maintain clearance from a power line. Contributing to the accident were low cloud and visibility conditions.NTSB SEA07LA114Accident · Minor injuriesLimited investigationFinal reportBritten-Norman BN-2A-20 · Hamilton, MTThe loss of power in one engine, for undetermined reasons, soon after establishing the takeoff departure climb. Factors include rough/uneven terrain.NTSB SEA06CA191Accident · No injuriesData collectionFinal reportMaule M-6-235 · Ronan, MTThe pilot's failure to maintain directional control during the landing roll in the tailwheel-equipped aircraft. A swale (sunken area) between the runway and the taxiway was a factor.NTSB SEA80DTA11Accident · No injuriesClosedCallair A-9 · Bloomfield, MTNTSB SEA80FTI06Accident · No injuriesClosedPiper PA-24 · Havre, MT