NTSB investigations: Lycoming 0-540 series, MT
49 cases on aircraft whose registry engine model is Lycoming 0-540 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
| 1964 | 2 |
|---|---|
| 1965 | 2 |
| 1966 | 1 |
| 1967 | 3 |
| 1968 | 1 |
| 1969 | 1 |
| 1970 | 4 |
| 1971 | 2 |
| 1972 | 1 |
| 1974 | 3 |
| 1975 | 1 |
| 1976 | 4 |
| 1977 | 1 |
| 1978 | 1 |
| 1979 | 1 |
| 1980 | 1 |
| 1982 | 2 |
| 1986 | 2 |
| 1991 | 1 |
| 1995 | 1 |
| 1997 | 1 |
| 1999 | 3 |
| 2001 | 1 |
| 2004 | 1 |
| 2005 | 1 |
| 2006 | 1 |
| 2008 | 1 |
| 2016 | 1 |
| 2020 | 1 |
| 2022 | 1 |
| 2025 | 1 |
| 2026 | 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 ('41532'))
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 ('41532'))
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 WPR26LA157Accident · No injuriesClass 3 · LimitedPreliminary reportCessna T182 · Marion, MTOn April 8, 2026, about 1315 mountain standard time, a Cessna T182, N5475N, was substantially damaged when it was involved in an accident near Marion, Montana. Both pilots were uninjured. The airplane was operated as a Title 14 Code of Federal Regulations…NTSB WPR25LA295Accident · No injuriesClass 3 · LimitedPreliminary reportSiai-Marchetti SF260B · Billings, MTOn September 26, 2025, about 1040 mountain daylight time, a SIAI-MARCHETTI SF 260B, N272C, was substantially damaged when it was involved in an accident near Billings, Montana. The pilot and passenger were not injured. The airplane was operated as a Title 14…NTSB WPR22LA262Accident · No injuriesClass 3 · LimitedFinal reportMaule M-5-235C · Three Forks, MTA loss of engine power due to degraded and incorrectly maintained ignition system components. Contributing to the accident was the pilot’s delay in turning the airplane towards the runway when the engine began to lose power.NTSB WPR20FA063Accident · 4 fatalClass 3 · FieldFinal reportCessna TR182 · Billings, MTThe pilot’s failure to maintain clearance due to poor decision making in selecting an unsafe altitude during cruise flight.NTSB GAA16CA285Accident · No injuriesData collectionFinal reportMaule M5 · Hamilton, MTThe pilot's failure to maintain directional control during the landing roll, which resulted in a runway excursion and a nose over.NTSB LAX08LA284Accident · No injuriesLimited investigationFinal reportCessna TR182 · Spotted Bear, MTThe pilot's inadequate compensation for the variable wind conditions and failure to maintain adequate airspeed during landing.NTSB SEA06LA052Accident · 1 fatalLimited investigationFinal reportRobinson R44 · Helena, MTThe pilot's intentional suicide. The unauthorized use of a helicopter and impairment by alcohol were factors.NTSB SEA05CA117Accident · Minor injuriesData collectionFinal reportPiper PA-25-260 · Geraldine, MTThe pilot's failure to maintain clearance with rising terrain. Rising terrain was a factor.NTSB SEA04LA118Accident · No injuriesLimited investigationFinal reportMaule M-7-235C · Miles City, MTThe pilot's failure to maintain directional control of the aircraft during the landing roll resulting in a main landing gear collapse.NTSB SEA01LA148Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Thompson Falls, MTThe pilot's inadequate compensation in gusting wind conditions during the landing flare. A tree was a factor.NTSB SEA00LA003Accident · No injuriesLimited investigationFinal reportMaule M-5-235C · Laurel, MTThe pilot's inadequate compensation for wind conditions. Factors include a dust devil/whirlwind at the location where the pilot was trying to land.NTSB SEA00LA006Accident · Minor injuriesLimited investigationFinal reportPiper PA-24-250 · Bozeman, MTThe pilot-in-command's (CFI) failure to take remedial action. Factors include the private pilot letting the airspeed get too low.NTSB SEA99LA083Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Plentywood, MTThe pilot's failure to ensure that the landing gear were properly down and locked for landing.NTSB SEA97LA100Accident · No injuriesLimited investigationFinal reportCessna TR182RG · Ennis, MTThe pilot's failure to adequately compensate for the wind conditions. Factors contributing to the accident were the gusting winds, and the presence of a ditch on the edge of the landing area.NTSB SEA95LA086Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Anaconda, MTThe pilot's attempt to conduct visual flight into instrument meteorological conditions, and his failure to maintain clearance from terrain.NTSB SEA92LA017Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Belt, MTA blocked fuel vent and an inadequate preflight inspection, which resulted in fuel starvation.NTSB DEN86LA183Accident · No injuriesLimited investigationFinal reportPiper PA-25-235 · Bynum, MTAfter the first landing on a gravel road for reloading liquid insecticide the pilot attempted to take off for an aerial application flight. During the take off ground roll the pilot observed that the left door was not properly closed. He momentarily reduced…NTSB DEN86LA154Accident · No injuriesLimited investigationFinal reportPiper PA-25-260 · Harve, MTAccording to the plt, shortly after takeoff the eng lost partial pwr as a result of carb ice, & a forced landing was made.NTSB DEN83LA034Accident · No injuriesLimited investigationFinal reportCessna TR182 · Billings, MTAfter power failure pilot landed on a highway and collided with an auto. No evidence of fuel was found in the aircraft.NTSB DEN82FTA10Accident · Serious injuriesFinal reportPiper PA-25-235 · Glendive, MTThe pilot reported that he had just loaded the sprayer and had made one pass downhill. At the end of the field, he started a left turn to make an uphill pass. The pilot stated that he got into bad air or down slope air and started to dump the chemical but it…NTSB DEN80FTA18Accident · Serious injuriesClosedPiper PA-25 · Sidney, MTNTSB SEA79DTI13Accident · Serious injuriesClosedPiper PA-24 · Sula, MTNTSB SEA78FTI18Accident · No injuriesClosedMaule M5235C · Havre, MTNTSB SEA77FTA18Accident · No injuriesClosedPiper PA-25 · Brockway, MTNTSB SEA76DTI29Accident · No injuriesClosedCallair A-9 · Pendroy, MTNTSB SEA76FTA25Accident · No injuriesClosedPiper PA-25 · Forsyth, MTNTSB SEA76FTI22Accident · Minor injuriesClosedPiper PA-24 · Thompson Falls, MTNTSB SEA76FTI20Accident · No injuriesClosedPiper PA-28 · Helena, MTNTSB SEA75FTI28Accident · No injuriesClosedPiper PA-24 · Boseman, MTNTSB SEA75FTA10Accident · Serious injuriesClosedCallair A-9 · Glendive, MTNTSB SEA75FTA07Accident · No injuriesClosedCallair A-9 · Pryor, MTNTSB SEA74FTA27Accident · No injuriesClosedPiper PA-25 · Broadview, MTNTSB SEA72DTA14Accident · Minor injuriesClosedPiper PA-25 · Brusett, MTNTSB SEA72FTA02Accident · No injuriesClosedCallair A-9 · Laurel, MTNTSB SEA71FTA23Accident · No injuriesClosedCallair A-9 · Opheim, MTNTSB SEA70FDA12Accident · No injuriesClosedCallair A-9 · Moore, MTNTSB SEA70FDA11Accident · No injuriesClosedPiper PA-25 · Lindsay, MTNTSB SEA70FDA09Accident · No injuriesClosedPiper PA-28 · Baker, MTNTSB SEA70DDA08Accident · No injuriesClosedPiper PA-25 · Billings, MTNTSB SEA69F0250Accident · No injuriesClosedCallair A-9 · St.Xavier, MTNTSB SEA68F0319Accident · No injuriesClosedPiper PA-25 · Santa Rita, MTNTSB SEA68D0111Accident · Minor injuriesClosedPiper PA-25 · Carter, MTNTSB SEA68F0078Accident · No injuriesClosedPiper PA-23 · Billings, MTNTSB SEA68F0040Accident · No injuriesClosedCallair A-9 · Dutton, MTNTSB SEA66F0291Accident · No injuriesClosedPiper PA-32 · Anaconda, MTNTSB SEA66D0161Accident · No injuriesClosedPiper PA-28 · Avon, MTNTSB SEA66F0190Accident · No injuriesClosedPiper PA-24 · Twin Bridges, MTNTSB UNK64X1546Accident · No injuriesClosedPiper PA24 · Billings, MTNTSB UNK64X0814Accident · No injuriesClosedPiper PA24 · Great Falls, MT