A de Havilland DHC-3 Otter floatplane on a scheduled flight between two seaplane bases abruptly entered a near-vertical 9,500-fpm descent and stuck the water in Mutiny Bay near Freeland, Washington, U.S., killing the pilot and all nine passengers. The airplane sank to the bottom of the bay and was destroyed.
Accident Investigation, Maintenance Matters, News
Missing Ring
A missing lock ring allowed a clamp nut to unthread, resulting in the fatal crash of a DHC-3, the NTSB says.