# NTSB investigations, IL: Aircraft structural failure

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 CEN20LA201](https://openairdocs.org/ntsb/CEN20LA201.md): Piper PA28 · Carlinville, IL · Accident · 4 fatal · Class 3 · Limited · Final report · May 31, 2020 · N8991W · Destroyed
  > The pilot’s attempted recovery from a steep descent which inadvertently exceeded the ultimate load factor of the airframe and resulted in a low-level inflight breakup.
- [NTSB CEN19LA251](https://openairdocs.org/ntsb/CEN19LA251.md): Ryan Navion · Chicago, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 27, 2019 · N27AW · Substantial damage
  > The failure of the left main landing gear upper side brace assembly during landing due to reverse bending fatigue as a result of the incomplete penetration of the circumferential weld during initial production of the component.
- [NTSB CEN16FA276](https://openairdocs.org/ntsb/CEN16FA276.md): Piper PA 30 · Plainfield, IL · Accident · 1 fatal · Field investigation · Final report · Jul 21, 2016 · N7409Y · Destroyed
  > The pilot's failure to maintain airplane control during an en route climb near convective activity, which resulted in an aerodynamic stall, an uncontrolled descent, and a subsequent in-flight breakup due to an exceedance of the airplane's design load…
- [NTSB CEN14LA196](https://openairdocs.org/ntsb/CEN14LA196.md): Piper PA 46-350P · West Chicago, IL · Accident · No injuries · Limited investigation · Final report · Apr 11, 2014 · N1972M · Substantial damage
  > The failure of the nose gear actuator attachment to the engine mount due to overstress, which resulted in the loss of directional control during landing.
- [NTSB CEN12IA377](https://openairdocs.org/ntsb/CEN12IA377.md): Piper PA-28R-200 · Lacon, IL · Incident · No injuries · Incident investigation · Final report · Jun 18, 2012 · N4350T · Minor damage
  > The propeller blade’s failure due to a fatigue crack that originated from a surface gouge that resulted from foreign object damage to the propeller blade that occurred at an unknown time.
- [NTSB CEN10LA560](https://openairdocs.org/ntsb/CEN10LA560.md): Schweizer 269C · Schaumburg, IL · Accident · No injuries · Limited investigation · Final report · Sep 20, 2010 · N34LB · Substantial damage
  > The in-flight separation of the left aft cluster fitting assembly following the loss of torque on the lock nut due to a manufacturing defect.
- [NTSB ENG08IA042](https://openairdocs.org/ntsb/ENG08IA042.md): Boeing 737 · Chicago, IL · Incident · Incident investigation · Final report · Oct 1, 2008 · N551WN · Minor damage
  > The right nose landing gear axle's failure from intergranular and fatigue cracking due to an earlier bearing failure.
- [NTSB CHI08LA158](https://openairdocs.org/ntsb/CHI08LA158.md): Maggs Lancair 4P · Alhambra, IL · Accident · 1 fatal · Limited investigation · Final report · Jun 6, 2008 · N241DM · Substantial damage
  > The pilot's decision to continue the flight into an area of known thunderstorm activity and the in-flight structural failure of the airplane.
- [NTSB CHI08CA087](https://openairdocs.org/ntsb/CHI08CA087.md): Cessna 140 · Poplar Grove, IL · Accident · No injuries · Data collection · Final report · Feb 23, 2008 · N3527V · Substantial damage
  > The left wing skin "fabric patch" separated from the wing ribs and spars for an undetermined reason.

## 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" = 'IL' 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" = '337' 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/337/sequence?state=IL

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