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NTSB investigations, 1977, MT

180,630 investigations by the National Transportation Safety Board since 1962: 174,609 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, 1977, MT per year, 1963–2026: 2,224 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	16

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") = 1977 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\") = 1977
    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") = 1977
  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 SEA78FA015Accident · 2 fatalClosedGrum Amer AA-5A · Anaconda, MTDec 28, 1977 · N9968U · Destroyed NTSB SEA78DTI04Accident · No injuriesClosedPiper PA-18 · Livingston, MTDec 23, 1977 · N4996P · Substantial damage NTSB SEA78FTA08Accident · Minor injuriesClosedBell 47G3B1 · Billings, MTDec 20, 1977 · N7860S · Destroyed NTSB SEA78DTI03Accident · No injuriesClosedCessna 170 · Browning, MTDec 18, 1977 · N5414C · Substantial damage NTSB SEA78FTA09Accident · No injuriesClosedCessna 150 · Peerless, MTDec 17, 1977 · N61067 · Substantial damage NTSB SEA78FTA07Accident · No injuriesClosedCessna TU206 · Zortman, MTDec 12, 1977 · N357DP · Substantial damage NTSB SEA78DTA06Accident · No injuriesClosedCessna 182 · Baker, MTNov 30, 1977 · N71638 · Substantial damage NTSB SEA78DTI01Accident · No injuriesClosedLuscombe 8AC · Boulder, MTNov 13, 1977 · N1041K · Substantial damage NTSB SEA78FTA05Accident · No injuriesClosedGrum Amer AA5A · Billings, MTNov 12, 1977 · N26106 · Substantial damage NTSB SEA77FTA04Accident · No injuriesClosedPiper PA-22 · Glendive, MTNov 7, 1977 · N8152D · Substantial damage NTSB SEA78FTA03Accident · No injuriesClosedCessna 185 · Bay Horse, MTNov 4, 1977 · N21709 · Substantial damage NTSB SEA78DTI02Accident · No injuriesClosedCessna 310G · Belgrade, MTOct 20, 1977 · N8984Z · Substantial damage NTSB SEA78FTA02Accident · Minor injuriesClosedCessna 210-5 · Lewistown, MTOct 2, 1977 · N8162Z · Substantial damage NTSB SEA77FTA01Accident · No injuriesClosedBellanca 8KCAB · Forsyth, MTOct 2, 1977 · N2535Z · Substantial damage NTSB SEA77DTI24Accident · No injuriesClosedCessna 120 · Chester, MTSep 23, 1977 · N2687N · Substantial damage NTSB SEA77DTI23Accident · No injuriesClosedCessna 182G · Ledger, MTSep 23, 1977 · N34105 · Substantial damage NTSB SEA77FTI22Accident · No injuriesClosedCessna 210D · W.Sulphur Spgs, MTSep 15, 1977 · N3964Y · Minor damage NTSB SEA77DTI20Accident · Minor injuriesClosedCessna 170 · Ft.Benton, MTSep 3, 1977 · N4212V · Substantial damage NTSB SEA77FTI19Accident · No injuriesClosedBell 47G3B2 · Missoula, MTSep 1, 1977 · N7937J · Substantial damage NTSB SEA77FTA29Accident · Serious injuriesClosedPiper PA-18 · Wyola, MTAug 29, 1977 · N3989P · Destroyed NTSB SEA77FTA30Accident · No injuriesClosedPiper PA-28 · Miles City, MTAug 26, 1977 · N5358L · Substantial damage NTSB SEA77DTI18Accident · No injuriesClosedCessna 180 · Cut Bank, MTAug 25, 1977 · N52102 · Substantial damage NTSB SEA77FTA28Accident · No injuriesClosedMaule M4 · Hardin, MTAug 12, 1977 · N12011 · Substantial damage NTSB SEA77FTI21Accident · No injuriesClosedCessna 150G · Helena, MTAug 8, 1977 · N3752J · Substantial damage NTSB SEA77FTI17Accident · Serious injuriesClosedPiper PA-28 · St.Regis, MTAug 6, 1977 · N9115W · Destroyed NTSB SEA77FTA23Accident · No injuriesClosedBellanca 7CE · Baker, MTAug 5, 1977 · N7525E · Substantial damage NTSB SEA77FTA27Accident · No injuriesClosedCessna 180 · Biddle, MTJul 28, 1977 · N968K · Substantial damage NTSB SEA77FTI16Accident · 2 fatalClosedCessna 150M · Helena, MTJul 27, 1977 · N45126 · Substantial damage NTSB SEA77FTI15Accident · No injuriesClosedEnstrom 280C · Dillon, MTJul 7, 1977 · N594H · Substantial damage NTSB SEA77FTA26Accident · No injuriesClosedPiper PA-28 · Billings, MTJul 4, 1977 · N9875W · Substantial damage NTSB SEA77FTA24Accident · No injuriesClosedCessna 140 · Jordan, MTJun 23, 1977 · N2040N · Substantial damage NTSB SEA77FA041Accident · 1 fatalClosedPiper PA-18 · Glasgow, MTJun 22, 1977 · N4094Z · Destroyed NTSB SEA77FTA25Accident · No injuriesClosedCessna T210M · Malta, MTJun 21, 1977 · N45SP · Substantial damage NTSB SEA77FTA21Accident · No injuriesClosedPiper J3C-65 · Scobey, MTJun 6, 1977 · N35214 · Substantial damage NTSB SEA77FA038Accident · 3 fatalClosedPiper PA-28 · Lavina, MTJun 4, 1977 · N1176H · Destroyed NTSB SEA77FTI14Accident · Minor injuriesClosedCessna 140 · Stevensville, MTJun 1, 1977 · N76330 · Destroyed NTSB SEA77FTA20Accident · No injuriesClosedCessna 206 · Billings, MTMay 31, 1977 · N1803Q · Substantial damage NTSB SEA77FTA19Accident · Minor injuriesClosedCessna 188 · Billings, MTMay 24, 1977 · N70146 · Substantial damage NTSB SEA77FTA18Accident · No injuriesClosedPiper PA-25 · Brockway, MTMay 21, 1977 · N7312Z · Substantial damage NTSB SEA77FTA17Accident · No injuriesClosedBellanca 7GCBC · Opheim, MTMay 9, 1977 · N88465 · Substantial damage NTSB SEA77DTI13Accident · Minor injuriesClosedPiper PA-18 · Chester, MTMay 3, 1977 · N4614Y · Destroyed NTSB SEA77FTA22Accident · No injuriesClosedPiper PA-20 · Ismay, MTMay 1, 1977 · N7635K · Substantial damage NTSB SEA77DTI12Accident · No injuriesClosedCessna 182A · Browning, MTApr 29, 1977 · N5913B · Substantial damage NTSB SEA77FTA16Accident · No injuriesClosedPiper J3 · Otter, MTApr 23, 1977 · N70209 · Substantial damage NTSB SEA78DA046Accident · 2 fatalClosedBeech 23 · Lewiston, MTApr 20, 1977 · C-GMUK · Destroyed NTSB SEA77FTI11Accident · Serious injuriesClosedBell 47G3B1 · Polson, MTApr 17, 1977 · N12437 · Substantial damage NTSB SEA77FTA15Accident · No injuriesClosedBeech C-45H · Plentywood, MTApr 3, 1977 · N5043K · Substantial damage NTSB SEA77FTI10Accident · No injuriesClosedPiper PA-28 · Gardiner, MTMar 26, 1977 · C-GDNW · Substantial damage NTSB SEA77FTA14Accident · No injuriesClosedPiper PA-18 · Boyes, MTFeb 25, 1977 · N1313A · Substantial damage NTSB SEA77FTA13Accident · No injuriesClosedPiper PA-28 · Plentywood, MTFeb 20, 1977 · N32532 · Substantial damage