# NTSB investigations, LA: 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 CEN22LA430](https://openairdocs.org/ntsb/CEN22LA430.md): Agusta AW139 · Houma, LA · Accident · No injuries · Class 3 · Limited · Final report · Sep 24, 2022 · N811TA · Substantial damage
  > The inflight loss of collective control of the helicopter due to thermal damage of a collective control torque tube that abraded with misrouted electrical wiring, which resulted in an electrical short and inflight fire. Contributing to the accident were the…
- [NTSB CEN22LA202](https://openairdocs.org/ntsb/CEN22LA202.md): Cessna 421C · Monroe, LA · Accident · No injuries · Class 3 · Limited · Final report · May 15, 2022 · N619AC · Substantial damage
  > The failure of the maintenance personnel to properly reinstall the elevator trim tab hardware, which resulted in an in-flight separation of the elevator.
- [NTSB WPR19LA112](https://openairdocs.org/ntsb/WPR19LA112.md): Air Tractor AT502 · Morganza, LA · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 16, 2019 · N599LA · Substantial damage
  > A loss of aircraft control due to the separation of the elevator pushrod attachment bolt.
- [NTSB CEN15LA265](https://openairdocs.org/ntsb/CEN15LA265.md): Bell 407 · Pecan Island, LA · Accident · No injuries · Limited investigation · Final report · Jun 8, 2015 · N501PH · Substantial damage
  > The fatigue fracture of the tail rotor gearbox attachment studs, which resulted in a loss of tail rotor control and a subsequent hard landing.
- [NTSB CEN15IA085](https://openairdocs.org/ntsb/CEN15IA085.md): Dassault/Sud FAN JET Falcon · Shreveport, LA · Incident · No injuries · Incident investigation · Final report · Dec 12, 2014 · N827AA · No damage
  > A short in the trim system’s wires and connector, which resulted in the elevator trim being in a full nose-down position.
- [NTSB CEN13LA225](https://openairdocs.org/ntsb/CEN13LA225.md): Atkins ACRO-SPORT I · Midland, LA · Accident · Minor injuries · Limited investigation · Final report · Apr 12, 2013 · N5897 · Substantial damage
  > The failure of the left elevator torque tube due to poor quality welds by the manufacturer, which resulted in the loss of pitch control.
- [NTSB CEN13FA192](https://openairdocs.org/ntsb/CEN13FA192.md): Sikorsky S-76A++ · Grand Lake, LA · Accident · 3 fatal · Field investigation · Final report · Mar 15, 2013 · N574EH · Destroyed
  > Fracture of the red tail rotor blade spar, which resulted in the separation and departure of the red tail rotor blade from the helicopter and subsequent compromised tail gearbox. The red tail rotor blade was not recovered, thus the cause of the initial…
- [NTSB CEN11IA286](https://openairdocs.org/ntsb/CEN11IA286.md): Cessna 560XL · Abbeville, LA · Incident · No injuries · Incident investigation · Final report · Apr 8, 2011 · N547CS · No damage
  > The pitch trim control cable failed due to fatigue, rendering the elevator trim inoperative.
- [NTSB CEN11IA156](https://openairdocs.org/ntsb/CEN11IA156.md): Sikorsky 92 · Galliano, LA · Incident · No injuries · Incident investigation · Final report · Jan 19, 2011 · N920AL · Minor damage
  > The misalignment of the retaining washer during routine maintenance, resulting in the subsequent separation of the washer and nut.
- [NTSB ENG10IA045](https://openairdocs.org/ntsb/ENG10IA045.md): Bell 430 · Venice, LA · Incident · No injuries · Incident investigation · Final report · Aug 4, 2010 · N430CM · Minor damage
  > The fracture of the collective servo actuator piston rod resulting from stress corrosion cracking.
- [NTSB CEN09LA571](https://openairdocs.org/ntsb/CEN09LA571.md): Messerschmitt-Boelkow-Blohm BO-105S · Thibodaux, LA · Accident · Minor injuries · Limited investigation · Final report · Sep 6, 2009 · N131EH · Substantial damage
  > The pilot's inability to maintain control due to the mechanic's inadvertent switching of two cyclic control tubes of different lengths during maintenance.
- [NTSB CEN09LA198](https://openairdocs.org/ntsb/CEN09LA198.md): Bell 206 · Galliano, LA · Accident · No injuries · Limited investigation · Final report · Mar 2, 2009 · N410RL · Substantial damage
  > The failure of the tail rotor driveshaft and coupling during engine start due to the mechanic's failure to properly reattach the tail rotor driveshaft and coupling during maintenance.

## 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" = 'LA' 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=LA

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