NTSB investigations: Lycoming TVO-435-GIA
5 cases on aircraft whose registry engine model is Lycoming TVO-435-GIA, where the first occurrence was “Hard landing”. 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
| 1985 | 1 |
|---|---|
| 1986 | 1 |
| 1993 | 2 |
| 1997 | 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.engine_model_code IN ('41526')
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\" = 200))
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.engine_model_code IN ('41526')
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" = 200))
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 FTW97LA319Accident · No injuriesLimited investigationFinal reportBell 47G-3B-2 · Montrose, COfailure of the flight instructor (CFI) to properly supervise the flight and ensure that adequate rotor rpm was maintainted during the autorotation/landing. The high density altitude was a related factor.NTSB SEA94LA042Accident · No injuriesLimited investigationFinal reportBell 47G3B1 · Mesa, WAThe pilot's improper flare. Factors include excessive airspeed while approaching the flare.NTSB LAX93LA209Accident · No injuriesLimited investigationFinal reportBell 47-G2 · AntarcticaThe pilot's poorly planned approach.NTSB DEN87LA019Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Goshen, UTThe plt was practicing power recovery autorotations then attempted one power off, full stop. The plt allowed the main rotor RPM to decay during approach and took no corrective action. The acft landed hard with slight forward motion and the plt applied aft…NTSB SEA85LA174Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 · Lebanon, ORThe plt stated he performed 4 circling approaches over a sand bar and on the 5th approcah, rotor RPM decayed. Unable to regain the RPM, a hard landing resulted during which the main rotor blades severed the tailrotor.