NTSB investigations: Franklin 6V4 series, 1984
6 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\") = 1984
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") = 1984
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 LAX85LA079Accident · No injuriesLimited investigationFinal reportBell 47G · Chatsworth, CAThe plt was practicing off airport touch & go's. on the second lndg the left skid contacted a hidden dirt embankment andthe acft rolled over. A post impact fire consumed the aircraft. Both certificated commercial plts aboard the helicopter escaped unharmed.…NTSB FTW85LA074Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Ardmore, OKThe acft collided with power lines during a recovery from a practice autorotational landing. The instructor plt took control of the acft for recovery and did not see the wires.NTSB FTW85LA043Accident · No injuriesLimited investigationFinal reportBell 47D1 · Terlingua, TXShortly after the plt took off on a sight-seeing flt, the eng lost power when the helicopter was over rough terrain at about 200 ft AGL. During an autorotative landing, the helicopter rocked forward causing the main rotor blades to strike the tail boom.…NTSB CHI84LA184Accident · Serious injuriesLimited investigationFinal reportBell 47D1 · Alpena, MIPrior to the accident, the owner/plt of the helicopter reportedly 'buzzed' a local baseball game. Shortly after that, the helicopter was observed to maneuver over a wooded area, enter a nose high attitude, then roll or bank & enter a descent into a wooded…NTSB CHI84LA181Accident · No injuriesLimited investigationFinal reportBell 47D-1 · Ridge Farm, ILThe helicopter rolled over after a hard landing following loss of rotor RPM. The plt reported that during initial climb at about 300 ft AGL the rotor decreased about 500 RPM. He tried to regain rotor RPM until about 100 ft AGL and then tried an autorotation.…NTSB MIA84FA058Accident · 1 fatalField investigationFinal reportHiller UH-12C · San Juan, PRA performer fell from a trapeze rigged below the helicopter while it was hovering at about 150 ft AGL. The FAA had not authorized the modification to the acft. The plt was not certified for external load operations. The performer reportedly had not done this…