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NTSB investigations, 1971, MT

180,616 investigations by the National Transportation Safety Board since 1962: 174,594 accidents, the rest incidents and other occurrences. Each has NTSB’s narrative and, once the investigation is done, its probable cause; since 2008, its findings and sequence of events.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19632026

NTSB investigations, 1971, MT per year, 1963–2026: 2,223 cases
1963	2
1964	78
1965	73
1966	87
1967	82
1968	61
1969	56
1970	67
1971	55
1972	46
1973	49
1974	59
1975	61
1976	60
1977	61
1978	57
1979	50
1980	46
1981	52
1982	57
1983	37
1984	38
1985	42
1986	34
1987	27
1988	31
1989	26
1990	32
1991	28
1992	29
1993	25
1994	29
1995	26
1996	23
1997	29
1998	38
1999	24
2000	28
2001	18
2002	25
2003	23
2004	29
2005	21
2006	33
2007	28
2008	20
2009	16
2010	14
2011	21
2012	17
2013	29
2014	21
2015	20
2016	18
2017	12
2018	14
2019	15
2020	19
2021	18
2022	14
2023	16
2024	18
2025	24
2026	15

Where

Latest cases

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 year(c."eventDate") = 1971 AND c."eventStateOrRegion" = 'MT' AND c."eventCountry" = 'USA' 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 year(c.\"eventDate\") = 1971
    AND c.\"eventStateOrRegion\" = 'MT' AND c.\"eventCountry\" = 'USA'
  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 year(c."eventDate") = 1971
  AND c."eventStateOrRegion" = 'MT' AND c."eventCountry" = 'USA'
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 SEA72DTI12Accident · No injuriesClosedCessna 172G · Loma, MTDec 27, 1971 · N3636L · Substantial damage NTSB SEA72AS021Accident · 2 fatalClosedMooney M20C · Broadus, MTNov 27, 1971 · N6436U · Destroyed NTSB SEA72AS019Accident · 1 fatalClosedCessna 150L · Ulm, MTNov 9, 1971 · N6691G · Destroyed NTSB SEA72DTA10Accident · No injuriesClosedLuscombe 8E · Volborg, MTOct 25, 1971 · N2472K · Substantial damage NTSB SEA72FTI09Accident · Serious injuriesClosedCessna 150 · Chinook, MTOct 24, 1971 · N6180T · Destroyed NTSB SEA72FTA09Accident · No injuriesClosedCessna 170B · Billings, MTOct 23, 1971 · N8234A · Substantial damage NTSB SEA72DTI08Accident · Serious injuriesClosedMooney M20C · Great Falls, MTOct 3, 1971 · N78939 · Substantial damage NTSB SEA72DTI07Accident · No injuriesClosedCessna 320 · Philipsburg, MTOct 2, 1971 · N5719X · Substantial damage NTSB SEA72FTA07Accident · No injuriesClosedPiper PA-23 · Harlowton, MTAug 31, 1971 · N4081P · Substantial damage NTSB SEA72DTI05Accident · No injuriesClosedDehavilland DH 104 · Chester, MTAug 21, 1971 · N1565V · Substantial damage NTSB SEA72DTI06Accident · No injuriesClosedCessna 337E · Livingston, MTAug 19, 1971 · N86545 · Substantial damage NTSB SEA72DTA08Accident · No injuriesClosedHughes 369HS · Mosby, MTAug 18, 1971 · N9059F · Substantial damage NTSB SEA72DTI04Accident · No injuriesClosedCessna 177 · Drummond, MTAug 6, 1971 · N29666 · Substantial damage NTSB SEA72FTA05Accident · No injuriesClosedCessna 150 · Sand Springs, MTAug 1, 1971 · N7971E · Substantial damage NTSB SEA72FTI03Accident · No injuriesClosedCessna 180 · Helena, MTJul 31, 1971 · N4577B · Substantial damage NTSB SEA72FTA02Accident · No injuriesClosedCallair A-9 · Laurel, MTJul 19, 1971 · N8264H · Substantial damage NTSB SEA72FTA04Accident · No injuriesClosedMaule M-4 · Wolf Point, MTJul 18, 1971 · N4700T · Substantial damage NTSB SEA72FTA03Accident · No injuriesClosedCessna 172 · Miles City, MTJul 14, 1971 · N8469U · Substantial damage NTSB SEA72DTI02Accident · No injuriesClosedAeronca 7AC · Conrad, MTJul 10, 1971 · N84458 · Substantial damage NTSB SEA72FTA01Accident · No injuriesClosedCessna 180D · Lodge Grass, MTJul 6, 1971 · N8609X · Substantial damage NTSB SEA72FTI01Accident · No injuriesClosedCessna 421B · Ennis, MTJul 5, 1971 · N803HK · Substantial damage NTSB SEA71FTA23Accident · No injuriesClosedCallair A-9 · Opheim, MTJun 20, 1971 · N9650Z · Substantial damage NTSB SEA71DTA24Accident · No injuriesClosedPiper PA-11 · Alzada, MTJun 16, 1971 · N4986H · Substantial damage NTSB SEA71FTI38Accident · 1 fatalClosedPiper PA-18 · Turner, MTJun 13, 1971 · N5765D · Destroyed NTSB SEA71DTI39Accident · No injuriesClosedLuscombe T-8F · Chinook, MTJun 13, 1971 · N2216B · Substantial damage NTSB SEA71FTI37Accident · No injuriesClosedCessna A188A · Havre, MTJun 8, 1971 · N9955G · Substantial damage NTSB SEA71FTI36Accident · Minor injuriesClosedCallair A-5 · Havre, MTJun 7, 1971 · N2957G · Substantial damage NTSB SEA71FTI35Accident · No injuriesClosedChampion 7AC · Belgrade, MTJun 5, 1971 · N84885 · Substantial damage NTSB SEA71DTI34Accident · No injuriesClosedCessna 182F · Shelby, MTJun 4, 1971 · N3463U · Substantial damage NTSB SEA71FTA22Accident · No injuriesClosedBeech A23-19 · Terry, MTJun 2, 1971 · N4722J · Substantial damage NTSB SEA71FTI33Accident · Minor injuriesClosedCessna 140 · Butte, MTMay 29, 1971 · N3079N · Substantial damage NTSB SEA71DTI32Accident · No injuriesClosedPiper PA-28 · Belgrade, MTMay 27, 1971 · N6357R · Substantial damage NTSB SEA71DTI31Accident · No injuriesClosedPiper PA-18 · Gallatin Gwy, MTMay 23, 1971 · N3695A · Substantial damage NTSB SEA71FTA21Accident · No injuriesClosedCessna 150J · Sidney, MTMay 17, 1971 · N60792 · Substantial damage NTSB SEA71FTA19Accident · 1 fatalClosedPitts Spec SC-1 · Lewiston, MTMay 9, 1971 · N21F · Destroyed NTSB SEA71DTI30Accident · No injuriesClosedCessna 175 · Havre, MTMay 2, 1971 · N7169M · Substantial damage NTSB SEA71FTI29Accident · No injuriesClosedCessna 150F · Libby, MTApr 29, 1971 · N6618F · Substantial damage NTSB SEA71FTA20Accident · No injuriesClosedCessna 170B · Brusett, MTApr 27, 1971 · N3479C · Substantial damage NTSB SEA71FDG28Accident · No injuriesClosedPiper PA-18 · Hamilton, MTApr 19, 1971 · N4299Z · Substantial damage NTSB SEA71FDA18Accident · No injuriesClosedCessna A188 · Joliet, MTApr 17, 1971 · N9821V · Substantial damage NTSB SEA71AS040Accident · 4 fatalClosedLear Jet 24D · Butte, MTApr 17, 1971 · N123CB · Destroyed NTSB SEA71FDG27Accident · No injuriesClosedMooney M20C · Santa Rita, MTApr 16, 1971 · N5996Q · Substantial damage NTSB SEA71FDG26Accident · No injuriesClosedCessna 150 · Plains, MTApr 16, 1971 · N61087 · Substantial damage NTSB SEA71FTA06Accident · No injuriesClosedTaylorcraft BC12-D · Baker, MTApr 10, 1971 · N94966 · Substantial damage NTSB SEA71FDG25Accident · No injuriesClosedBellanca 14-19 · Butte, MTApr 8, 1971 · N9832B · Substantial damage NTSB SEA71FDA16Accident · No injuriesClosedCessna 182N · Hysham, MTMar 31, 1971 · N8949G · Substantial damage NTSB SEA71FDA15Accident · No injuriesClosedStinson 108-2 · Alzada, MTMar 19, 1971 · N171C · Substantial damage NTSB SEA71FDA17Accident · No injuriesClosedPiper PA-11 · Alzada, MTMar 11, 1971 · N4532M · Substantial damage NTSB SEA71FDA14Accident · No injuriesClosedCessna 310C · Miles City, MTMar 10, 1971 · N1814H · Substantial damage NTSB SEA71DDG24Accident · No injuriesClosedCessna 177 · Great Falls, MTMar 9, 1971 · N2237Y · Substantial damage