NTSB investigations: Franklin 6A4165 series, OK

7 cases on aircraft whose registry engine model is Franklin 6A4165 series. 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

NTSB investigations: Franklin 6A4165 series, OK per year, 1964–2026: 7 cases
1964	1
1971	2
1972	1
1988	1
1989	1
2004	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."eventStateOrRegion" = 'OK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27025')) 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.\"eventStateOrRegion\" = 'OK' AND c.\"eventCountry\" = 'USA'
    AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27025'))
  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."eventStateOrRegion" = 'OK' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27025'))
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 FTW04LA171Accident · Serious injuriesLimited investigationFinal reportStinson 108-3 · Tulsa, OKThe loss of engine power for undetermined reasons.Jun 29, 2004 · N6183M · Substantial damage NTSB FTW89DPJ05Accident · No injuriesFinal reportNord Stampe SV4C · Bartlesville, OKTotal failure of the engine connecting rod.Jun 3, 1989 · N47SV · Substantial damage NTSB FTW88DPJ05Accident · 1 fatalFinal reportStinson 108-3 · Collinsville, OKThe pilot experienced a loss of engine power during the takeoff leg. Post accident investigation revealed that the fuel selector was in the near closed position. This position only allowed a small percentage of the fuel to flow but would allow operation in…Jun 6, 1988 · N4108C · Destroyed NTSB FTW72FPM30Accident · Serious injuriesClosedStinson 108-2 · Catoosa, OKMay 12, 1972 · N395C · Substantial damage NTSB FTW72FPM02Accident · No injuriesClosedBellanca 14-13 · Collinsville, OKJul 10, 1971 · N86754 · Substantial damage NTSB FTW71DPJ39Accident · No injuriesClosedStinson 108-3 · Shattuck, OKApr 9, 1971 · N6946M · Substantial damage NTSB UNK64X3822Accident · No injuriesClosedStinson 108-1 · Ardmore, OKSep 6, 1964 · N8149K · Substantial damage