# NTSB investigations: Lycoming VO-435 series: Miscellaneous/other

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 WPR26LA207](https://openairdocs.org/ntsb/WPR26LA207.md): Bell 47G-2 · Mettler, CA · Accident · No injuries · Class 4 · Limited · Final report · Jun 1, 2026 · N88755 · Substantial damage
  > The pilot's failure to ensure the loading hose had been disconnected before takeoff, which resulted in an interrupted takeoff and subsequent loss of control. Contributing to the accident was the ground loader's failure to disconnect the hose before…
- [NTSB ERA19TA213](https://openairdocs.org/ntsb/ERA19TA213.md): Continental Copters Tomcat MK6C · Franklin, KY · Accident · Minor injuries · Class 3 · Final report · Jul 8, 2019 · N41830 · Substantial damage
  > The pilot’s failure to maintain main rotor rpm after takeoff, which resulted in a collision with terrain.
- [NTSB CEN16LA213](https://openairdocs.org/ntsb/CEN16LA213.md): Bell 47G 5 · Laureles, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 2016 · N6203N · Substantial damage
  > The pilot's failure to apply additional engine power when he applied collective input, which led to a loss of rotor speed and the exceedance of the helicopter’s performance capability.
- [NTSB GAA15CA122](https://openairdocs.org/ntsb/GAA15CA122.md): Continental Copters Tomcat MK5A · Elk Mound, WI · Accident · No injuries · Data collection · Final report · Jun 14, 2015 · N9045T · Substantial damage
  > The pilot's failure to maintain a positive rate of climb after taking off from the service truck, which resulted in the helicopter impacting terrain.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '900'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/900/cases?engine=41525

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