Seaplane Crash Washington State 2025 Schedule. Investigators have confirmed that a mechanical issue caused the seaplane crash that killed 10 people off an island in washington state last year. The national transportation safety board (ntsb) on friday released more than 500 pages of documents, including video, of a floatplane crash that killed 10 people last year.

According to the national transportation safety board, the crash was caused. The plane owned by swan river seaplanes was returning to its base in perth, the western australia state capital 30 kilometers (19 miles) east of rottnest island, which is also.