# NTSB investigations, TN: Flight control sys malf/fail

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 ERA25LA290](https://openairdocs.org/ntsb/ERA25LA290.md): Gary W Lewinski Sonex · Tellico Plains, TN · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Aug 5, 2025 · N67BG · Substantial damage
  > On August 5, 2025, about 1131 eastern daylight time, a Lewinski Sonex, N67BG, was substantially damaged when it was involved in an accident near Tellico Plains, Tennessee. The private pilot was seriously injured. The airplane was operated as a Title 14?Code…
- [NTSB ERA19FA225](https://openairdocs.org/ntsb/ERA19FA225.md): Quicksilver Mxii · Oliver Springs, TN · Accident · 1 fatal · Class 3 · Field · Final report · Jul 13, 2019 · N3889Z · Substantial damage
  > The noncertificated pilot’s decision to continue to takeoff and climb after encountering an undetermined airplane control issue that he was unable to counteract, which resulted in collision with trees and subsequent impact with terrain.
- [NTSB ERA12LA368](https://openairdocs.org/ntsb/ERA12LA368.md): Schweizer 269C · Piney Flats, TN · Accident · No injuries · Limited investigation · Final report · May 24, 2012 · N760DA · Substantial damage
  > The mechanic’s improper maintenance of the main transmission aft pinion nut and belt drive system, which resulted in the uncoupling of the tail rotor driveshaft and the subsequent loss of helicopter control.
- [NTSB ERA11CA375](https://openairdocs.org/ntsb/ERA11CA375.md): Temco GC-1B · Sparta, TN · Accident · No injuries · Data collection · Final report · Jul 2, 2011 · N106S · Substantial damage
  > The improper installation of the right rudder control cable by maintenance personnel, which resulted in the pilot's inability to maintain directional control during takeoff.
- [NTSB NYC08LA259](https://openairdocs.org/ntsb/NYC08LA259.md): Sands Thomas E Rotorway 162 · Graysville, TN · Accident · Serious injuries · Limited investigation · Final report · Jul 27, 2008 · N412TS · Destroyed
  > A loss of control for undetermined reasons.

## 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" = 'TN' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '333' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/333/sequence?state=TN

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