# Fatal NTSB investigations: Lycoming TVO-435-GIA NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB CEN13FA357](https://openairdocs.org/ntsb/CEN13FA357.md): Bell 47G-3B-1 · Maplewood, MN · Accident · 1 fatal · Field investigation · Final report · Jun 19, 2013 · N5024N · Destroyed > The loss of helicopter control for reasons that could not be determined because an examination of the helicopter and its systems revealed no malfunctions or failures that would have precluded normal operation. - [NTSB SEA00FA061](https://openairdocs.org/ntsb/SEA00FA061.md): Bell 47G-3B-1 · Stanwood, WA · Accident · 1 fatal · Field investigation · Final report · Apr 2, 2000 · N3377H · Destroyed > The 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 FTW98GA097](https://openairdocs.org/ntsb/FTW98GA097.md): Bell 47G-3B-2 · Spanish Fork, UT · Accident · 1 fatal · Final report · Jan 14, 1998 · N1461W · Substantial damage > A total loss of power due to repeated engine overspeeds. A related factor was unsuitable terrain. - [NTSB SEA89LA175](https://openairdocs.org/ntsb/SEA89LA175.md): Bell 47G3B2 · Monitor, WA · Accident · 1 fatal · Limited investigation · Final report · Sep 18, 1989 · N83111 · Destroyed > The pilot failed to maintain aircraft separation from obstacles on the ground. A factor in the accident was the bright glare from the rising sun. - [NTSB DEN88FA106](https://openairdocs.org/ntsb/DEN88FA106.md): Bell 47G-3B1 · Cortez, CO · Accident · 1 fatal · Field investigation · Final report · May 7, 1988 · N8455E · Destroyed > The plt said that he had just taken off and reached an alt of about 300 ft when his collective control went 'limp'. The helicopter entered a descent, partially controlled by the plt using throttle and cyclic control inputs. The helicopter touched down in soft… - [NTSB SEA86LA176](https://openairdocs.org/ntsb/SEA86LA176.md): Bell 47G-3B1 · Burbank, WA · Accident · 1 fatal · Limited investigation · Final report · Jul 23, 1986 · N1197W · Minor damage > The helicopter had landed for reloading and was stationary with rotors idling. A ground loader person approached the helicopter over a small sandy knoll and was struck by the main rotor, sustaining fatal injury. - [NTSB ATL84FA001](https://openairdocs.org/ntsb/ATL84FA001.md): Bell 47G-3B1 · Pliny, WV · Accident · 1 fatal · Field investigation · Final report · Oct 1, 1983 · N1334X · Destroyed > The helicopter was being used in the construction of elect transmission lines. A 150-FT longline cable had been utilizedon an earlier flight for lifting external loads. However, there was no reason for the longline to be attached on the accident flight as the… - [NTSB SEA80FA018](https://openairdocs.org/ntsb/SEA80FA018.md): Bell 47G3B1 · Jefferson, OR · Accident · 2 fatal · Closed · Jan 30, 1980 · N73285 · Destroyed - [NTSB DEN80FA005](https://openairdocs.org/ntsb/DEN80FA005-201189.md): Soloy 47G · Ruidoso, NM · Accident · 1 fatal · Closed · Oct 23, 1979 · N7828S · Destroyed - [NTSB DEN79FA065](https://openairdocs.org/ntsb/DEN79FA065.md): Bell 47G · Deming, NM · Accident · 1 fatal · Closed · Sep 20, 1979 · N2220W · Destroyed - [NTSB IAD77DA011](https://openairdocs.org/ntsb/IAD77DA011.md): Bell 47G-2 · Pigeon Forge, TN · Accident · 1 fatal · Closed · Nov 6, 1976 · N6755D · Destroyed - [NTSB DEN75AD009](https://openairdocs.org/ntsb/DEN75AD009.md): Bell 47G3B1 · Ogden, UT · Accident · 1 fatal · Closed · Sep 5, 1974 · N73972 · Destroyed - [NTSB DEN73AD055](https://openairdocs.org/ntsb/DEN73AD055.md): Bell 4G3B2A · Luna, NM · Accident · 1 fatal · Closed · Jun 19, 1973 · N83111 · Substantial damage - [NTSB SEA73FYG13](https://openairdocs.org/ntsb/SEA73FYG13.md): Bell 47-G2A · Selah, WA · Accident · 1 fatal · Closed · Sep 23, 1972 · N73284 · Substantial damage - [NTSB LAX71AL033](https://openairdocs.org/ntsb/LAX71AL033.md): Bell 47G3B1 · Rim Forest, CA · Accident · 1 fatal · Closed · Dec 1, 1970 · N1126W · Destroyed - [NTSB LAX70A0008](https://openairdocs.org/ntsb/LAX70A0008.md): Bell 47G3B1 · Grnd Canyon, AZ · Accident · 3 fatal · Closed · Jul 30, 1969 · N73909 · Destroyed - [NTSB CAN70A4457](https://openairdocs.org/ntsb/CAN70A4457.md): Schweizer SGS126 · Hope, Canada · Accident · 3 fatal · Closed · Jul 26, 1969 · CF-VEQ · 2 aircraft · Destroyed - [NTSB SEA69A0008](https://openairdocs.org/ntsb/SEA69A0008.md): Bell 47G3B1 · North Fork, ID · Accident · 1 fatal · Closed · Jul 23, 1968 · N8537F · Destroyed - [NTSB DEN66A0074](https://openairdocs.org/ntsb/DEN66A0074.md): Bell 47G-3B · Grand Canyon, AZ · Accident · 1 fatal · Closed · Apr 12, 1966 · N73909 · Destroyed - [NTSB UNK64X0473](https://openairdocs.org/ntsb/UNK64X0473.md): Bell 47G3B1 · Little Nway, CA · Accident · 1 fatal · Closed · Feb 5, 1964 · N73909 · Destroyed ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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."highestInjuryLevel" = 'Fatal' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41526')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41526&fatal=1 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.