NTSB investigations: Franklin 6V4 series, 1987
4 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\") = 1987
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") = 1987
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 SEA87LA172Accident · Serious injuriesLimited investigationFinal reportBell 47G2 · Grandview, WAAfter the completion of spray operations the pilot was attempting to place the helicopter onto a trailer. The pilot misjudged his position, over-corrected, and then lost control of the helicopter, striking the ground.NTSB LAX87LA294Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Taft, CAThe plt rprtd the eng lost power at about 300' AGL after the helicopter had flown aprx 2.7 hrs without refueling. He initiated an autorotative landing; however, before touchdown, the main rotor blades contacted & severed the tail boom. An exam revealed the…NTSB ATL87LA204Accident · No injuriesLimited investigationFinal reportBell 47D1 · Huntsville, ALThe aerial application flight was dispensing insecticides on a cotton field. While maneuvering to avoid powerlines during the procedure turnaround following an upwind swath run, the pilot failed to maintain sufficient airspeed to ensure effective…NTSB ATL87DEI05Accident · Minor injuriesFinal reportBell 47G-2 · Lisbon, OHThe helicopter rolled over as it was lifting off from a transport trailer. A post-crash exam revealed that the left rear tie-down strap on the trailer was wrapped around one of the helicopter skids. The ground crewman believed he had removed all of the straps…