NTSB investigations: Bell 47G-2
9 cases on aircraft the registry lists as Bell 47G-2, 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
| 1983 | 1 |
|---|---|
| 1985 | 2 |
| 1987 | 2 |
| 1990 | 1 |
| 1991 | 1 |
| 1994 | 1 |
| 1995 | 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 ('1181008')
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 ('1181008')
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 SEA95LA126Accident · Serious injuriesLimited investigationFinal reportBell 47G-2 · Zillah, WAThe failure of company maintenance personnel to perform adequate inspections of the helicopter, and the failure of the cyclic control rod due to corrosion.NTSB CHI95LA003Accident · Minor injuriesLimited investigationFinal reportBell 47G2 · Decatur, ILthe failure of the roller springs in the freewheeling unit of the transmission which caused the unit to disengage.NTSB SEA91LA077Accident · No injuriesLimited investigationFinal reportBell BH-47G2A · Waitsburg, WAThe improper installation of the main rotor mast nut and lock washer by maintenance personnel which resulted in the separation of the main rotor system.NTSB MKC90LA088Accident · Serious injuriesLimited investigationFinal reportBell 47 · Oakdale, MNA slipping rotor drive clutch assembly due to improper maintenance by company personnel. Contributing factors were static wires in the path.NTSB FTW88LA008Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Lapra, TXUpon entering a bank approx. 80 to 100 ft. off the ground, the aircraft experienced a power loss with vibration. During autorotation the aircraft contacted a tree causing substantial damage. Examination of the wreckage found the transmission clutch assembly…NTSB MIA87LA190Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Miami, FLThe instructor plt stated that the helicopter began to vibrate while the student plt was maneuvering it during an instructional flt. The instructor plt then executed a forced landing and upon touchdown the main rotor blades contacted the ground. Inspection of…NTSB LAX85LA400Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Watsonville, CADuring an ag flt, at abt 5 ft AGL, the plt heard a loud bang, the eng oversped, & all pwr to the rotor blades was lost. The plt attempted to immediately land in the underlying field, but had insufficient altitude/airspeed to autorotate. The acft touched down,…NTSB MIA85LA223Accident · No injuriesLimited investigationFinal reportBell 47G-2 · Ochopee, FLThe plt stated that he dropped his passenger off at a water station in the everglades, water taxied away from the station, accellerated up to 3100 RPM & just before he added collective pitch the transmission ass'y departed the helicopter, it rolled to the…NTSB ANC83FA092Accident · No injuriesField investigationFinal reportBell B47G-2 · Anchorage, AKThe helicopter experienced a tail rotor strike during a hard landing with a door open. According to the student pilot who is a commercial pilot working on an add-on helicopter rating, the left cockpit door unlatched and partially opened on the downwind leg…