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NTSB investigations, 1966, 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, 1966, 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") = 1966 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\") = 1966
    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") = 1966
  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 SEA67A0044Accident · 2 fatalClosedMooney M20E · Wolf Creek, MTDec 26, 1966 · N2747W · Destroyed NTSB SEA67D0272Accident · No injuriesClosedChampion 7GCB · Great Falls, MTDec 25, 1966 · N9601S · Substantial damage NTSB SEA67D0266Accident · No injuriesClosedAeronca 7AC · Circle, MTDec 20, 1966 · N2849E · Substantial damage NTSB SEA67A0043Accident · No injuriesClosedBrantly B-2B · Wyola, MTDec 18, 1966 · N2183U · Substantial damage NTSB SEA67D0219Accident · No injuriesClosedBeech A23-19 · Billings, MTNov 26, 1966 · N5775V · Substantial damage NTSB SEA67A0039Accident · 5 fatalClosedCessna 172G · Chinook, MTNov 25, 1966 · N6068R · Destroyed NTSB SEA67D0191Accident · No injuriesClosedPiper PA-18 · Rudyard, MTNov 20, 1966 · N9136D · Substantial damage NTSB SEA67D0221Accident · Serious injuriesClosedAeronca 7AC · Capitol, MTNov 13, 1966 · N82708 · Destroyed NTSB SEA67F0193Accident · No injuriesClosedPiper PA-30 · Billings, MTNov 12, 1966 · N7730Y · Substantial damage NTSB CHI67A0064Accident · Serious injuriesClosedBoeing B-720 · Billings, MTNov 12, 1966 · N7203U · No damage NTSB SEA67D0194Accident · No injuriesClosedCessna 180 · Swan Lake, MTNov 11, 1966 · N2493F · Substantial damage NTSB SEA67D0192Accident · No injuriesClosedBeech 35 · Thom Falls, MTOct 29, 1966 · N80415 · Substantial damage NTSB SEA67D0195Accident · No injuriesClosedStinson 108-3 · Malta, MTOct 19, 1966 · N659C · Substantial damage NTSB SEA67D0186Accident · No injuriesClosedPiper PA-28 · Billings, MTOct 17, 1966 · N6991W · Substantial damage NTSB SEA67D0165Accident · No injuriesClosedCessna 172 · Chinook, MTOct 16, 1966 · N7327T · Substantial damage NTSB SEA67D0169Accident · No injuriesClosedPiper PA-22 · Square Butte, MTOct 15, 1966 · N1337C · Substantial damage NTSB SEA67D0168Accident · No injuriesClosedMooney M20B · W S Springs, MTOct 9, 1966 · N74785 · Substantial damage NTSB SEA67A0027Accident · 2 fatalClosedBell 47G3B1 · W.Yellowston, MTSep 21, 1966 · N1169W · Destroyed NTSB SEA67A0026Accident · 4 fatalClosedPiper PA-28 · Alberton, MTSep 20, 1966 · N5182W · Destroyed NTSB SEA67A0025Accident · No injuriesClosedBell 47G-3 · Noxon, MTSep 19, 1966 · N6782D · Destroyed NTSB SEA67D0144Accident · No injuriesClosedPiper PA-18 · Dillon, MTSep 16, 1966 · N3952Z · Substantial damage NTSB SEA67D0167Accident · No injuriesClosedCessna 185 · Great Falls, MTSep 15, 1966 · N4145Y · Substantial damage NTSB SEA67D0120Accident · No injuriesClosedCessna 140 · Great Falls, MTSep 15, 1966 · N72308 · Substantial damage NTSB SEA67D0185Accident · No injuriesClosedStinson 108-2 · Laurel, MTSep 11, 1966 · N967D · Substantial damage NTSB SEA67F0129Accident · Minor injuriesClosedPiper PA-12 · Thomp. Falls, MTSep 10, 1966 · N78576 · Substantial damage NTSB SEA67F0111Accident · No injuriesClosedCessna 182 · Dupuyer, MTSep 9, 1966 · N3175S · Substantial damage NTSB SEA67D0120Accident · No injuriesClosedBeech 35 · Libby, MTSep 9, 1966 · N3172V · Substantial damage NTSB SEA67D0138Accident · No injuriesClosedPiper PA-18 · Stevensville, MTSep 4, 1966 · N3973P · Substantial damage NTSB SEA67D0132Accident · Minor injuriesClosedCessna 172 · Dutton, MTSep 4, 1966 · N2328U · Destroyed NTSB SEA67F0133Accident · No injuriesClosedStinson 108-3 · Hamilton, MTAug 22, 1966 · N6669M · Substantial damage NTSB SEA67D0110Accident · No injuriesClosedCessna 150F · Belgrade, MTAug 16, 1966 · N8024S · Substantial damage NTSB SEA67D0108Accident · No injuriesClosedCessna 180 · Conrad, MTAug 16, 1966 · N4603U · Substantial damage NTSB SEA67F0107Accident · No injuriesClosedPiper PA-18 · Zortman, MTAug 14, 1966 · N1197C · Substantial damage NTSB SEA67D0139Accident · No injuriesClosedStearman PT-17 · Big Horn, MTAug 12, 1966 · N51132 · Substantial damage NTSB SEA67F0077Accident · No injuriesClosedPiper PA-24 · Laurel, MTAug 7, 1966 · N6593P · Substantial damage NTSB SEA67D0102Accident · No injuriesClosedCessna 180 · W.Yellowstone, MTAug 3, 1966 · N5156E · Substantial damage NTSB SEA67F0086Accident · Minor injuriesClosedPiper PA-22 · Eurek, MTJul 30, 1966 · N6063D · Substantial damage NTSB SEA67D0100Accident · No injuriesClosedCessna 210 · Polson, MTJul 30, 1966 · N9454X · Substantial damage NTSB SEA67F0078Accident · 1 fatalClosedLuscombe 8A · Chinook, MTJul 27, 1966 · N2978K · Destroyed NTSB SEA67F0054Accident · No injuriesClosedPiper PA-25 · Winifred, MTJul 25, 1966 · N6880Z · Substantial damage NTSB SEA67D0092Accident · No injuriesClosedGrumman TBM-3E · Potomac, MTJul 25, 1966 · N3969A · Substantial damage NTSB SEA67D0081Accident · No injuriesClosedPiper PA-18 · Neihart, MTJul 25, 1966 · N7699Y · Substantial damage NTSB SEA67F0148Accident · No injuriesClosedPiper PA-18 · Molt, MTJul 15, 1966 · N3839Z · Substantial damage NTSB SEA67D0035Accident · No injuriesClosedPiper PA-28 · Butte, MTJul 15, 1966 · N7392W · Substantial damage NTSB SEA67D0075Accident · No injuriesClosedMorrisey 2150 · Babb, MTJul 14, 1966 · N5107V · Substantial damage NTSB SEA67A0002Accident · Serious injuriesClosedBell 47-G3B · Clinton, MTJul 14, 1966 · N8509F · Destroyed NTSB SEA67A0004Accident · 1 fatalClosedCessna 172B · Roy, MTJul 8, 1966 · N7834X · Destroyed NTSB SEA67D0055Accident · No injuriesClosedCessna 172 · Kalispell, MTJul 1, 1966 · N3733L · Substantial damage NTSB SEA66A0072Accident · Minor injuriesClosedBell 47G3B1 · Livingston, MTJun 30, 1966 · N73916 · Destroyed NTSB SEA67D0142Accident · No injuriesClosedChampion 7ECA · Lewistown, MTJun 28, 1966 · N8306V · Substantial damage