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

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 WPR19LA019](https://openairdocs.org/ntsb/WPR19LA019.md): Bell 47G · Wichita Falls, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Nov 2, 2018 · N1159W · Destroyed
  > A total loss of engine power for reasons that could not be determined based on the available information.
- [NTSB CEN14LA174](https://openairdocs.org/ntsb/CEN14LA174.md): Bell 47G 3B · Oglesby, TX · Accident · No injuries · Limited investigation · Final report · Mar 30, 2014 · N147WT · Substantial damage
  > Maintenance personnel’s failure to safety wire the throttle control adapter per maintenance instructions when the carburetor was replaced and to detect that the adapter was not safety wired during the annual inspection, which resulted in the throttle control…
- [NTSB DFW06CA055](https://openairdocs.org/ntsb/DFW06CA055.md): Bell 47-B3 · Dennison, TX · Accident · No injuries · Data collection · Final report · Jan 13, 2006 · N1575 · Substantial damage
  > The in-flight separation of the stabilizer bar tube.
- [NTSB FTW92LA026](https://openairdocs.org/ntsb/FTW92LA026.md): Bell 47G3B2A · Texarkana, TX · Accident · Serious injuries · Limited investigation · Final report · Nov 24, 1991 · N8134J · Substantial damage
  > The pilot's failure to maintain proper terrain clearance during takeoff. A factor was his lack of total experience in helicopters.
- [NTSB FTW90DPA03](https://openairdocs.org/ntsb/FTW90DPA03.md): Bell-Moore 47G-2A · Sivell Bend, TX · Accident · No injuries · Final report · May 8, 1990 · N25126 · Substantial damage
  > Clearance was not maintained by the pilot-in-command.
- [NTSB FTW87GA083](https://openairdocs.org/ntsb/FTW87GA083.md): Bell 47G-3B-1 · Odessa, TX · Accident · No injuries · Final report · Mar 21, 1987 · N62462 · Substantial damage
  > Investigation reveals the helicopter touched down on the heel of its skids, left skid first, and at a slightly low rotor RPM. The tail boom then moved upward while the main rotor blades flexed downward. The main rotor blades contacted and severed the tail…

## 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."eventStateOrRegion" = 'TX' AND c."eventCountry" = 'USA'
  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&state=TX

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.