# NTSB investigations: Lycoming AEIO-540 series: 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 ERA25FA185](https://openairdocs.org/ntsb/ERA25FA185.md): MX Aircraft Tech PTY MXS · Hampton, VA · Accident · 1 fatal · Class 3 · Field · Final report · Apr 24, 2025 · N530RH · Substantial damage
  > A counterweight plug that loosened during the accident flight, jammed the elevator, and resulted in loss of control during landing.
- [NTSB WPR12LA407](https://openairdocs.org/ntsb/WPR12LA407.md): Moore Edward R MXS · Borrego Springs, CA · Accident · 1 fatal · Limited investigation · Final report · Sep 8, 2012 · N21MX · Substantial damage
  > The pilot’s inability to maintain control of the airplane following the loss of aileron and elevator control due to the forward flight control torque tube assembly’s detachment from the forward bearing. Contributing to the accident was the inadequate…
- [NTSB WPR12FA155](https://openairdocs.org/ntsb/WPR12FA155.md): Extra Flugzeugbau EA-300 · Salinas, CA · Accident · 2 fatal · Field investigation · Final report · Apr 8, 2012 · N45R · Substantial damage
  > A loose portable XM-GPS antenna that migrated to the tail section of the airplane and jammed the elevator bell crank. Contributing to the accident was the pilot’s failure to account for the cockpit portable GPS antenna during preflight or postflight…

## 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 ('41568')
    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" = '333'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/333/cases?engine=41568

---
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.