# NTSB investigations, WA: Part(s) separation from AC

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 WPR26LA041](https://openairdocs.org/ntsb/WPR26LA041.md): Bessler Duane Lynn Savannah · Pacific, WA · Accident · No injuries · Class 3 · Limited · Preliminary report · Nov 7, 2025 · N358D · Substantial damage
  > On November 7, 2025 at 1331 Pacific standard time, an experimental amateur-built ICP Savannah amphibious airplane, N358D, was substantially damaged when it was involved in an accident near Pacific, Washington. The pilot and the passenger were not injured. The…
- [NTSB WPR26LA026](https://openairdocs.org/ntsb/WPR26LA026.md): Extra Flugzeugbau EA 300/L · Arlington, WA · Accident · No injuries · Class 3 · Limited · Preliminary report · Oct 14, 2025 · N300EX · Substantial damage
  > On October 14, 2025, at about 1030 Pacific daylight time, an EXTRA FLUGZEUGBAU GMBH 300L, N300EX, was substantially damaged when it was involved in an accident near Arlington, Washington. The flight instructor and private pilot receiving instruction were…
- [NTSB WPR23FA351](https://openairdocs.org/ntsb/WPR23FA351.md): Golden Circle T Bird · Arlington, WA · Accident · 1 fatal · Class 3 · Field · Final report · Sep 22, 2023 · UNREG · Substantial damage
  > A failure of the forward left wing spar due to an improper repair, which resulted in an inflight separation of the left wing. Contributing to the accident was improper maintenance by splicing the wing spar.
- [NTSB GAA19CA376](https://openairdocs.org/ntsb/GAA19CA376.md): Piper PA 12 · Yakima, WA · Accident · No injuries · Data collection · Final report · Jun 30, 2019 · N4238M · Substantial damage
  > The separation of the left steering spring from the tailwheel assembly during landing for reasons that could not be determined, which resulted in a ground loop.
- [NTSB WPR18LA147](https://openairdocs.org/ntsb/WPR18LA147.md): Bell UH 1H · Olympia, WA · Accident · Serious injuries · Class 3 · Limited · Final report · May 25, 2018 · N111DR · Substantial damage
  > A loss of tail rotor thrust due to the improper installation of the tail rotor assembly by maintenance personnel resulted in the pilot’s inability to maintain control of the helicopter as he began transition into forward flight from a hover, which resulted in…
- [NTSB WPR17LA119](https://openairdocs.org/ntsb/WPR17LA119.md): Paul R Seipt Sonex · Garfield, WA · Accident · No injuries · Class 3 · Limited · Final report · Jun 3, 2017 · N255BZ · Substantial damage
  > The pilot’s improper torque of screws that attached the flywheel mounting flange to the crankshaft during engine assembly, which resulted in heavy vibrations and the subsequent in-flight loss of the propeller.
- [NTSB WPR15LA092](https://openairdocs.org/ntsb/WPR15LA092.md): Alexander RV-7 · Seabeck, WA · Accident · 1 fatal · Limited investigation · Final report · Jan 26, 2015 · N747BA · Destroyed
  > A loss of airplane control for reasons that could not be determined because the airplane impacted water, and the majority of the wreckage was not recovered.
- [NTSB WPR14LA308](https://openairdocs.org/ntsb/WPR14LA308.md): Mdhi 369D · Oso, WA · Accident · Serious injuries · Limited investigation · Final report · Jul 22, 2014 · N5225C · Substantial damage
  > The pilot/mechanic’s failure to properly perform required inspections of the main rotor blades at the necessary intervals, which resulted in an in-flight separation of a main rotor blade due to disbonding and fatigue cracking. Contributing to the accident was…
- [NTSB WPR12CA294](https://openairdocs.org/ntsb/WPR12CA294.md): Omlin Robert G Exec 162F Rotorway · Quincy, WA · Accident · No injuries · Data collection · Final report · Jul 5, 2012 · N385AR · Substantial damage
  > The pilot’s failure to ensure that a flag attached to the landing skid was properly secured, which resulted in its in-flight separation and contact with the tail rotor.

## 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" = 'WA' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT e.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e."isDefiningEvent" AND e."tier2Number" = '338')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/338/cases?state=WA

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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.