NTSB investigations: Allison 250 SER 400HP, 1978

8 cases on aircraft whose registry engine model is Allison 250 SER 400HP. 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.

Defining event

Finding

Phase of flight

Aircraft model

Cases per year

19692026

NTSB investigations: Allison 250 SER 400HP, 1978 per year, 1969–2026: 231 cases
1969	2
1972	3
1973	1
1974	1
1975	7
1976	7
1977	9
1978	8
1979	10
1980	16
1981	6
1982	7
1983	5
1984	3
1985	8
1986	5
1987	8
1988	3
1989	7
1990	7
1991	5
1992	2
1993	5
1994	3
1995	5
1996	7
1997	7
1998	4
1999	4
2000	3
2001	5
2002	2
2003	6
2004	5
2005	4
2006	1
2007	4
2008	2
2009	2
2010	4
2011	4
2013	2
2015	5
2016	4
2018	1
2019	1
2022	4
2023	3
2024	2
2025	1
2026	1

Where

Open the map

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") = 1978 AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012')) 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\") = 1978
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012'))
  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") = 1978
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03013', '03012'))
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 OAK79FVD01Accident · Serious injuriesClosedHughes 500D · Garberville, CAOct 19, 1978 · N58183 · Destroyed NTSB LAX78FUM34Accident · No injuriesClosedBell 206B · Holtville, CAAug 18, 1978 · N16733 · Substantial damage NTSB FTW78FA066Accident · 1 fatalClosedBolkow BO-105 · Cameron, LAAug 13, 1978 · N17235 · Destroyed NTSB MKC78FER81Accident · Serious injuriesClosedHughes 369HS · Sauk Centre, MNJul 28, 1978 · N9199F · Destroyed NTSB MIA78FA109Accident · Serious injuriesClosedSikorsky S76A · W Palm Beach, FLJul 28, 1978 · N763SA · Substantial damage NTSB OAK78FJA08Accident · Minor injuriesClosedBell 206B · Mauna Kea, HIJun 12, 1978 · N59622 · Substantial damage NTSB FTW78FPA21Accident · No injuriesClosedBell 206B · Mc Kinney, TXApr 16, 1978 · N23JH · Substantial damage NTSB FTW78FA025Accident · 1 fatalClosedBell 206B · Palacids, TXJan 25, 1978 · N90024 · Destroyed