NTSB investigations: Bell 47G-3B-1
9 cases on aircraft the registry lists as Bell 47G-3B-1, where the first occurrence was “Airframe/component/system failure/malfunction”. 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
| 1988 | 1 |
|---|---|
| 1989 | 1 |
| 1990 | 1 |
| 1991 | 1 |
| 1995 | 1 |
| 1997 | 1 |
| 2000 | 1 |
| 2001 | 1 |
| 2005 | 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 c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181028', '118103A')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o.\"occurrenceNumber\" = 1 AND o.\"occurrenceCode\" = 130))
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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181028', '118103A')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 130))
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 DEN05LA137Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Rock Springs, WYthe pilot's failure to maintain control of the helicopter during the attempted autorotation after he experienced an engine overspeed that occurred for reasons undetermined.NTSB LAX01LA098Accident · No injuriesLimited investigationFinal reportBell 47-G3B1 · Winterhaven, CAA failure of the transmission free wheeling unit due to improper maintenance. A factor was the dark night visual condition.NTSB SEA00FA061Accident · 1 fatalField investigationFinal reportBell 47G-3B-1 · Stanwood, WAThe disengagement of the oil jet fitting from its threaded receptacle at the forward end of the engine crankshaft. This resulted in excessive oil within the clutch assembly, the subsequent slipping of the clutch, and ultimately the disengagement of the rotor…NTSB FTW97LA264Accident · Serious injuriesLimited investigationFinal reportBell 47G-3B-1 · Crossett, ARfailure of maintenance personnel to perform an adequate inspection of the fuselage center frame and detect a fatigue fracture of a longeron tube on the upper left side of the center frame, which resulted in a disconnect of the tail rotor drive shaft from the…NTSB NYC95LA147Accident · 1 fatalLimited investigationFinal reportBell 47G-3B-1 · Hammonton, NJfailure of the collective yoke bearing, which resulted in an uncontrolled descent and collision with trees. A factor relating to the accident was: the manufacturer's inadequate inspection interval of the yoke bearing.NTSB CHI91LA257Accident · No injuriesLimited investigationFinal reportBell 47G · Lake Ozark, MOFailure of the rotorcraft's tail boom in flight. Factors related to the accident were reduced aircraft control available to the pilot.NTSB NYC90DNA04Accident · No injuriesFinal reportBell 47G-3B-1 · Hanson, MAThe pilot's loss of control of the helicopter due to the failure of the tail rotor drive shaft.NTSB MIA89LA165Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-1 · Keystone Hgts., FLThe tail rotor drive system became disconnected due to a bent tail rotor drive shaft. The trees contributed to the helicopter damage.NTSB DEN88GA088Accident · No injuriesFinal reportBell 47G-3B1 · Gobernador, NMThe commerical plt was hovering out of ground effect at 40 feet AGL. During a maneuver he reported hearing a loud bang and the rotor RPM began to decay. The plt made a hovering autorotation resulting in a hard landing. The main rotor struck the tail boom and…