# NTSB investigations, CO: 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 CEN26LA235](https://openairdocs.org/ntsb/CEN26LA235.md): Beech V35B · Greeley, CO · Accident · No injuries · Class 4 · Limited · Investigation open · Jun 17, 2026 · N4275S · No damage
- [NTSB ANC26LA060](https://openairdocs.org/ntsb/ANC26LA060.md): Beech E33 · Steamboat Springs, CO · Accident · No injuries · Class 4 · Limited · Investigation open · Jun 13, 2026 · N8475N · Substantial damage
- [NTSB CEN25LA245](https://openairdocs.org/ntsb/CEN25LA245.md): Fairchild 24R · Greeley, CO · Accident · No injuries · Class 4 · Limited · Final report · Jul 9, 2025 · N81210 · Substantial damage
  > The pilot’s inability to maintain directional control during landing due to excessive wear in the tailwheel steering assembly.
- [NTSB CEN24LA270](https://openairdocs.org/ntsb/CEN24LA270.md): Cessna R172E · Hillrose, CO · Incident · No injuries · Class 3 · Limited · Final report · Jul 6, 2024 · N23788 · Minor damage
  > The binding of the left flap due to improper maintenance.
- [NTSB CEN21FA272](https://openairdocs.org/ntsb/CEN21FA272.md): Antenor Velazco Lancair Evolution · Parker, CO · Accident · 2 fatal · Class 3 · Field · Final report · Jun 16, 2021 · N704AK · Destroyed
  > The pilot’s diversion of attention following an asymmetric flap deployment, which resulted in a descent and collision with powerlines. Contributing to the accident was maintenance personnel’s failure to properly secure the flap control rod attachment bolts,…
- [NTSB GAA15CA294](https://openairdocs.org/ntsb/GAA15CA294.md): Howard DGA 15P · Englewood, CO · Accident · No injuries · Data collection · Final report · Sep 25, 2015 · N1785H · Substantial damage
  > The separation of the elevator control system linkage at a push/pull tube and cable joint, for an unknown reason, because the bolt and associated hardware securing the joint was not found for examination.
- [NTSB CEN15CA159](https://openairdocs.org/ntsb/CEN15CA159.md): Arnold Zodiac CH 650 · Greeley, CO · Accident · No injuries · Data collection · Final report · Feb 27, 2015 · N715AK · Substantial damage
  > The pilot was unable to maintain directional control during the landing due to the foreign object that lodged behind the rudder.

## 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" = 'CO' 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=CO

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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.