NTSB investigations: Lycoming TVO-435-GIA, 1991
7 cases on aircraft whose registry engine model is Lycoming TVO-435-GIA. 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 | 6 |
|---|---|
| 1965 | 3 |
| 1966 | 12 |
| 1967 | 15 |
| 1968 | 14 |
| 1969 | 16 |
| 1970 | 12 |
| 1971 | 6 |
| 1972 | 12 |
| 1973 | 9 |
| 1974 | 12 |
| 1975 | 10 |
| 1976 | 9 |
| 1977 | 10 |
| 1978 | 9 |
| 1979 | 9 |
| 1980 | 11 |
| 1981 | 5 |
| 1982 | 4 |
| 1983 | 5 |
| 1984 | 4 |
| 1985 | 3 |
| 1986 | 8 |
| 1987 | 4 |
| 1988 | 2 |
| 1989 | 4 |
| 1990 | 5 |
| 1991 | 7 |
| 1992 | 3 |
| 1993 | 3 |
| 1994 | 2 |
| 1995 | 1 |
| 1996 | 3 |
| 1997 | 7 |
| 1998 | 4 |
| 1999 | 4 |
| 2000 | 3 |
| 2001 | 1 |
| 2002 | 1 |
| 2003 | 3 |
| 2004 | 2 |
| 2005 | 3 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 5 |
| 2012 | 1 |
| 2013 | 2 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 3 |
| 2020 | 1 |
| 2024 | 1 |
| 2026 | 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 year(c.\"eventDate\") = 1991
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"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") = 1991
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" 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 FTW92LA026Accident · Serious injuriesLimited investigationFinal reportBell 47G3B2A · Texarkana, TXThe pilot's failure to maintain proper terrain clearance during takeoff. A factor was his lack of total experience in helicopters.NTSB NYC92LA006Accident · Minor injuriesLimited investigationFinal reportBell 47G-3B-1 · Catawissa, PAPilot factor in that the pilot used poor judgement and loaded more passengers than were seats on the helicopter this resulted in control interference and subsequent loss of control. Contributing was the pilot's failure to check the weight and balance for the…NTSB MIA91LA217Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Penuelas, PRInadvertent control interference by a passenger shortly after takeoff resulting in the loss of control and roll over after touchdown.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 DEN91LA096Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Colorado Spring, COThe pilot attempting to operate the helicopter outside the design operating envelope. Factors were: high altitude, high temperature, and high density altitude.NTSB CHI91DER05Accident · No injuriesFinal reportBell 47G3B1 · Lasalle, MNThe pilot's failure to maintain adequate clearance from the terrain. A related factor is the pilot's misjudged altitude above the crop.NTSB SEA91LA109Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Malott, WAAn undetermined failure of the fuel pump casing resulting in an in flight fire and loss of engine power.