# Fatal NTSB investigations: Lycoming VO-540 series

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 CHI08LA211](https://openairdocs.org/ntsb/CHI08LA211.md): Bell 47G-4A · Mayville, WI · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2008 · N24HM · Minor damage
  > The pilot's failure to maintain clearance with the rotating rotor blades after he exited the helicopter after landing.
- [NTSB LAX03LA197](https://openairdocs.org/ntsb/LAX03LA197.md): Bell 47-G4 · Porterville, CA · Accident · 1 fatal · Limited investigation · Final report · Jun 13, 2003 · N9017N · Destroyed
  > loss of control for undetermined reasons.
- [NTSB ATL02FA107](https://openairdocs.org/ntsb/ATL02FA107.md): Bell 47G-4A · Yauco, PR · Accident · 1 fatal · Field investigation · Final report · May 25, 2002 · N6SR · Destroyed
  > The pilot's failure to apply carburetor heat that resulted in a partial loss of engine power and the subsequent collision with an object during the forced landing. A factor was weather conditions favorable for the formation of carburetor ice.
- [NTSB SEA99FA013](https://openairdocs.org/ntsb/SEA99FA013.md): Hiller UH-12E · Marshall, WA · Accident · 1 fatal · Field investigation · Final report · Nov 10, 1998 · N752GB · Destroyed
  > The loss of the bolt that connects the lateral cyclic linkage push rod to the lower end of the upper firewall-mounted lateral cyclic linkage bellcrank, resulting in an uncontrolled descent into the terrain.
- [NTSB LAX96LA315](https://openairdocs.org/ntsb/LAX96LA315.md): Bell 47-G4A · Guam · Accident · 1 fatal · Limited investigation · Final report · Aug 26, 1996 · N474GA · Destroyed
  > loss of tail rotor control due to improper maintenance.
- [NTSB CHI94LA191](https://openairdocs.org/ntsb/CHI94LA191.md): Hiller HU-12E · Watertown, SD · Accident · 1 fatal · Limited investigation · Final report · Jun 23, 1994 · N330CW · Destroyed
  > the pilot's failure to maintain a visual lookout. A factor associated with the accident was the powerlines.
- [NTSB LAX93LA166](https://openairdocs.org/ntsb/LAX93LA166.md): Bell 47G2A · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Limited investigation · Final report · Mar 24, 1993 · N8493E · Minor damage
  > The passenger's failure to adhere to the pilot's instructions. Factors which contributed to the accident were: the language/communications difficulty between the pilot & the passenger, and the bird strike.
- [NTSB NYC92FA117](https://openairdocs.org/ntsb/NYC92FA117.md): Bell 47-G4A · Shelburne Falls, MA · Accident · 3 fatal · Field investigation · Final report · Jun 16, 1992 · N1041B · Destroyed
  > The pilot's failure to maintain adequate obstacle clearance. Contributing was inadequate altitude.
- [NTSB LAX91LA388](https://openairdocs.org/ntsb/LAX91LA388.md): Texas Helicopter M74 · Farmington, CA · Accident · 1 fatal · Limited investigation · Final report · Sep 11, 1991 · N43921 · Destroyed
  > Loss of engine power for an undetermined reason. Factors related to the accident were: the excessive gross weight of the helicopter, and the pilot's improper use of flight controls due to impairment from use of a drug (marijuanna).
- [NTSB ATL90FA089](https://openairdocs.org/ntsb/ATL90FA089.md): Hiller UH-12D · Soddy-Daisy, TN · Accident · 1 fatal · Field investigation · Final report · Mar 31, 1990 · N94496 · Substantial damage
  > Fatigue induced failure of the collective pitch push rod (adjustable) during flight, and the failure of the pilot to provide routine maintenance. The pilot's lack of expereince and his failure to obtain required training and certification were factors in the…
- [NTSB LAX84FA130](https://openairdocs.org/ntsb/LAX84FA130.md): Bell 47J-2 · Kahuku, HI · Accident · 1 fatal · Field investigation · Final report · Jan 1, 1984 · N2097 · Destroyed
  > About 3 min after takeoff, the helicopter was observed descending in a 'gliding fashion' until water impact. A witness reported that it appeared to be flying straight & did not appear to be in trouble. The witness reported that she could hear the eng & it…
- [NTSB SEA81FA035](https://openairdocs.org/ntsb/SEA81FA035.md): Bell 47G-4A · Aberdeen, WA · Accident · 2 fatal · Closed · May 19, 1981 · N9457 · Destroyed
- [NTSB LAX79FA081](https://openairdocs.org/ntsb/LAX79FA081.md): Bell 47J-2 · Long Beach, CA · Accident · 5 fatal · Closed · Sep 14, 1979 · N930NR · Destroyed
- [NTSB LAX78FA008](https://openairdocs.org/ntsb/LAX78FA008.md): Bell 47J-2 · Burbank, CA · Accident · 2 fatal · Closed · Nov 22, 1977 · N8442E · Destroyed
- [NTSB SEA74AS030](https://openairdocs.org/ntsb/SEA74AS030.md): Bell 47G-4A · Wapato, WA · Accident · 1 fatal · Closed · Jan 20, 1974 · N1396X · Destroyed
- [NTSB NYC74AN035](https://openairdocs.org/ntsb/NYC74AN035.md): Bell 47G-5 · Waynesburg, PA · Accident · 2 fatal · Closed · Oct 25, 1973 · N8556F · Destroyed
- [NTSB IAD73FIJ25](https://openairdocs.org/ntsb/IAD73FIJ25.md): Bell 47G2A1 · Stickney, WV · Accident · 1 fatal · Closed · Jun 7, 1973 · N1215W · Destroyed
- [NTSB SEA72FYE03](https://openairdocs.org/ntsb/SEA72FYE03.md): Hiller 12E · Skykomish, WA · Accident · 1 fatal · Closed · Jul 16, 1971 · N9749C · Destroyed
- [NTSB ANC69A0027](https://openairdocs.org/ntsb/ANC69A0027.md): Bell 47G-4A · Kenai, AK · Accident · 1 fatal · Closed · Nov 4, 1968 · N1396X · Destroyed
- [NTSB CHI68A0107](https://openairdocs.org/ntsb/CHI68A0107.md): Bell 47J-2 · Rice Lake, WI · Accident · 1 fatal · Closed · Jun 14, 1968 · N73258 · Destroyed
- [NTSB FTW68A0084](https://openairdocs.org/ntsb/FTW68A0084.md): Brantly 305 · Orange, TX · Accident · 1 fatal · Closed · Mar 30, 1968 · N2212U · 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 ('41534', '41582'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41534&fatal=1

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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.