NTSB investigations: Franklin 6V4 series, 1998
5 cases on aircraft whose registry engine model is Franklin 6V4 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.
Cases per year
| 1964 | 16 |
|---|---|
| 1965 | 10 |
| 1966 | 16 |
| 1967 | 15 |
| 1968 | 4 |
| 1969 | 15 |
| 1970 | 10 |
| 1971 | 12 |
| 1972 | 9 |
| 1973 | 10 |
| 1974 | 11 |
| 1975 | 16 |
| 1976 | 11 |
| 1977 | 10 |
| 1978 | 11 |
| 1979 | 10 |
| 1980 | 7 |
| 1981 | 4 |
| 1982 | 8 |
| 1983 | 2 |
| 1984 | 6 |
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 4 |
| 1988 | 4 |
| 1989 | 5 |
| 1990 | 5 |
| 1991 | 2 |
| 1992 | 4 |
| 1993 | 1 |
| 1994 | 5 |
| 1995 | 4 |
| 1996 | 1 |
| 1997 | 2 |
| 1998 | 5 |
| 1999 | 2 |
| 2000 | 2 |
| 2001 | 3 |
| 2003 | 1 |
| 2004 | 2 |
| 2005 | 2 |
| 2007 | 1 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 2 |
| 2012 | 1 |
| 2013 | 3 |
| 2014 | 2 |
| 2015 | 1 |
| 2017 | 2 |
| 2021 | 1 |
| 2026 | 1 |
Where
Open the mapLatest cases
Query with SQL
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\") = 1998
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27033'))
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") = 1998
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27033'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESCRun 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 CHI99LA012Accident · No injuriesLimited investigationFinal reportHiller UH-12C · Clinton, IAthe failure of the 90 degree gearbox for reasons undetermined. Factors were the failure of the gearbox, and it not being possible for the pilot to maintain control of the aircraft.NTSB MIA98LA254Accident · Minor injuriesLimited investigationFinal reportBell 47-D1 · Oxford, MSThe pilot's failure to maintain directional control due to vibration from the main rotor blade for undetermined reasons. A related finding was the improper repair of a crack in the laminant of the blue main rotor blade by other maintenance personnel.NTSB MIA98LA170Accident · No injuriesLimited investigationFinal reportBell 47G · Bunnell, FLThe pilot-in-command(CFI) failure to maintain control of the aircraft.NTSB FTW98LA144Accident · Minor injuriesLimited investigationFinal reportBell 47D1 · Jeanerette, LAThe in-flight disconnect of the rotating scissors due to the separation of its hinge bolt.NTSB MIA98LA051Accident · No injuriesLimited investigationFinal reportBell 47D1 · Bunnell, FLthe student pilot's improper planning/decision, which resulted in fuel exhaustion, loss of engine power, and a forced landing.