NTSB investigations: Schweizer SGS 2-33A, 1976

7 cases on aircraft the registry lists as Schweizer SGS 2-33A. 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

19682026

NTSB investigations: Schweizer SGS 2-33A, 1976 per year, 1968–2026: 238 cases
1968	1
1969	6
1970	5
1971	5
1972	6
1973	8
1974	5
1975	11
1976	7
1977	17
1978	12
1979	6
1980	6
1981	7
1982	3
1983	9
1984	5
1985	5
1986	7
1987	5
1988	5
1989	3
1990	5
1991	5
1992	5
1993	4
1994	5
1995	5
1996	5
1997	4
1998	2
1999	3
2000	4
2001	1
2002	1
2003	1
2004	3
2005	3
2006	1
2007	5
2008	4
2009	1
2011	1
2012	3
2013	5
2014	1
2017	1
2018	1
2019	1
2020	1
2021	3
2022	5
2024	1
2025	2
2026	2

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") = 1976 AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8051606')) 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\") = 1976
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8051606'))
  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") = 1976
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('8051606'))
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 NYC77FNE02Accident · Serious injuriesClosedSchweizer SGS233 · Pittsfield, MAOct 17, 1976 · N33977 · Destroyed NTSB NYC76DFJ33Accident · Serious injuriesClosedSchweizer SGS233 · Ithaca, NYSep 6, 1976 · N17870 · No damage NTSB FTW76DRG89Accident · No injuriesClosedSchweizer SGS233 · Spicewood, TXSep 5, 1976 · N1185S · Substantial damage NTSB NYC76FHA44Accident · No injuriesClosedSchweizer SGS233 · Kutztown, PAAug 1, 1976 · N33920 · Substantial damage NTSB MIA76DLG34Accident · Minor injuriesClosedSchweizer SGS233 · Aiken, SCJun 15, 1976 · N7537 · Substantial damage NTSB FTW76DPJ29Accident · No injuriesClosedSchweizer SGS233 · Lawton, OKMar 20, 1976 · N65863 · Substantial damage NTSB LAX76DUG44Accident · No injuriesClosedSchweizer SGS233 · Adelanto, CAFeb 29, 1976 · N7589 · Substantial damage