NTSB investigations: Lycoming VO-435 series, 1995
9 cases on aircraft whose registry engine model is Lycoming VO-435 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 | 17 |
|---|---|
| 1965 | 18 |
| 1966 | 15 |
| 1967 | 21 |
| 1968 | 12 |
| 1969 | 16 |
| 1970 | 28 |
| 1971 | 15 |
| 1972 | 20 |
| 1973 | 25 |
| 1974 | 28 |
| 1975 | 24 |
| 1976 | 18 |
| 1977 | 14 |
| 1978 | 27 |
| 1979 | 20 |
| 1980 | 18 |
| 1981 | 16 |
| 1982 | 15 |
| 1983 | 14 |
| 1984 | 14 |
| 1985 | 16 |
| 1986 | 13 |
| 1987 | 10 |
| 1988 | 12 |
| 1989 | 11 |
| 1990 | 6 |
| 1991 | 13 |
| 1992 | 10 |
| 1993 | 8 |
| 1994 | 11 |
| 1995 | 9 |
| 1996 | 7 |
| 1997 | 4 |
| 1998 | 5 |
| 1999 | 5 |
| 2000 | 6 |
| 2001 | 5 |
| 2002 | 8 |
| 2003 | 8 |
| 2004 | 4 |
| 2005 | 4 |
| 2006 | 4 |
| 2007 | 4 |
| 2009 | 3 |
| 2010 | 2 |
| 2011 | 5 |
| 2012 | 3 |
| 2013 | 6 |
| 2014 | 6 |
| 2015 | 4 |
| 2016 | 5 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 6 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 1 |
| 2025 | 1 |
| 2026 | 2 |
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\") = 1995
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
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") = 1995
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525'))
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 FTW96LA008Accident · Minor injuriesLimited investigationFinal reportBell 47-G2 · Freer, TXthe pilot's failure to maintain clearance from the power lines due to his improper takeoff technique. A factor was the helicopter induced blowing dust which impaired the pilot's visibility.NTSB SEA95LA227Accident · No injuriesLimited investigationFinal reportTexas Helicopter OH-13E · Yakima, WAFatigue failure of the bolt attaching the scissor arm assembly to the pitch control support assembly. The failure of the bolt led to a loss of collective pitch control and reduced rotor RPM.NTSB ATL95LA145Accident · No injuriesLimited investigationFinal reportBell 47G2 · Montrose, GAThe pilot's inadequate preflight planning and visual lookout.NTSB FTW95LA310Accident · Serious injuriesLimited investigationFinal reportWilliams Bell OH13H/Tomcat MK5A · Alicia, ARThe pilot's failure to remove the refueling hose. A factor was that he diverted his attention from the refueling operation.NTSB LAX95LA216Accident · No injuriesLimited investigationFinal reportBell 47-G5 · Coalinga, CAclutch slippage for undetermined reasons. A factor in the accident was the helicopter's low above ground altitude, which limited the pilot's time and ability to recover main rotor rpm.NTSB LAX95LA213Accident · No injuriesLimited investigationFinal reportBell 47-G2A · Bakersfield, CAthe pilot's failure to maintain adequate lateral clearance from the irrigation standpipe while applying chemicals to a field.NTSB FTW95LA239Accident · No injuriesLimited investigationFinal reportBell 47G-5 · Falfurrias, TXInadvertent installation of an unapproved part (tail rotor gear/drive assembly), that became excessively worn since it did not conform to the manufacturer's specification, resulting in failure of the associated tail rotor bearing (also an unapproved part),…NTSB NYC95LA100Accident · Minor injuriesLimited investigationFinal reportBell 47G-5A · Middleboro, MAthe pilot's failure to maintain airspeed during a low altitude aerial application turn, which resulted in inadvertent settling with power and the subsequent collision with the terrain.NTSB LAX95LA138Accident · No injuriesLimited investigationFinal reportBell 47 · Harmon Fieldan engine failure due to oil exhaustion from a missing oil pressure relief valve as the result of an improper maintenance inspection.