Final NTSB investigations: Piper L-21A

9 cases on aircraft the registry lists as Piper L-21A. 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

19642026

Final NTSB investigations: Piper L-21A per year, 1964–2026: 9 cases
1964	1
1965	1
1969	1
1970	1
1971	2
1974	1
1984	1
1995	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 c."completionStatus" = 'Completed' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7101814')) 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 c.\"completionStatus\" = 'Completed'
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7101814'))
  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 c."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('7101814'))
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 ANC95FA157Accident · 1 fatalField investigationFinal reportPiper L-21A · Kaktovik, AKThe pilot's failure to maintain adequate altitude/clearance from mountainous terrain.Aug 18, 1995 · N8373H · Destroyed NTSB BFO84FA003Accident · 2 fatalField investigationFinal reportPiper L-21-A · Selbyville, DEAt the conclusion of towing banners with no pax on board, the acft was landed and topped off with fuel. The plt then reentered the acft and an additional employee got in the rear seat with the intension of flying to a nearby airport for a plt exchange. During…Aug 8, 1984 · N10468 · Destroyed NTSB IAD75FIG07Accident · Minor injuriesClosedPiper PA-18 · Emmitsburg, MDOct 23, 1974 · N10468 · Substantial damage NTSB CHI72DLQ14Accident · No injuriesClosedPiper PA-18 · Fort Knox, KYSep 22, 1971 · N4220A · Substantial damage NTSB FTW72DPJ06Accident · No injuriesClosedPiper PA-18 · Fort Sill, OKJul 31, 1971 · N6482D · Substantial damage NTSB CHI71DGJ10Accident · No injuriesClosedPiper PA-18 · Ft.Knox, KYAug 22, 1970 · N4220A · Substantial damage NTSB DIA69D0163Accident · No injuriesClosedPiper PA-18 · Edgewood, MDMar 23, 1969 · N10468 · Substantial damage NTSB NYC65F/UOKAccident · No injuriesClosedPiper PA-18 · Ft Eustis, VAApr 5, 1965 · N4220A · Substantial damage NTSB UNK65X0365Accident · 2 fatalClosedPiper PA-18 · Dugway, UTOct 21, 1964 · N5031K · Destroyed