# NTSB investigations: Lycoming TVO-435-GIA, 1985

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 SEA85LA174](https://openairdocs.org/ntsb/SEA85LA174.md): Bell 47G-3B-1 · Lebanon, OR · Accident · No injuries · Limited investigation · Final report · Jul 19, 1985 · N9417A · Substantial damage
  > The 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.
- [NTSB SEA85LA178](https://openairdocs.org/ntsb/SEA85LA178.md): Bell 47G-3B-1 · Idaho City, ID · Accident · No injuries · Limited investigation · Final report · Jun 11, 1985 · N1333X · Substantial damage
  > While the student plt was on a x-country flt, the eng lost power after the supercharger failed. The plt stated that he was unable to maintain altitude & RPM; he subsequently made a forced landing in a heavily timbered, mountainous area.
- [NTSB DEN85LA144](https://openairdocs.org/ntsb/DEN85LA144.md): Continental Copters Tomcat Mark 5A/OH13H · Freeman, SD · Accident · Minor injuries · Limited investigation · Final report · May 29, 1985 · N9081T · Substantial damage
  > The plt said he had completed 4 to 5 swath runs (crop spraying mission). During a turning manuever with a left quatering tail wind, full left pedal,full pwr,the helicopter had a high sink rate until grd impact.

## 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 year(c."eventDate") = 1985
  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&year=1985

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