De Havilland DHC-3 Otter crash, Sep 4, 2022 (10 killed)
De Havilland DHC-3 Otter accident on September 4, 2022 near Mutiny Bay, Washington, United States with 10 fatalities. Cause: In flight unthreading of...
- Date: September 4, 2022
- Aircraft: De Havilland DHC-3 Otter
- Location: Mutiny Bay, Washington, United States
- Fatalities: 10
- Phase of flight: En route
- Cause: In flight unthreading of the clamp nut from the horizontal stabilizer trim actuator barrel due to a missing lock ring moved the stabilizer to an extreme trailing edge down position, making pitch uncontrollable (NTSB).
A Friday Harbor Seaplanes DHC 3 Otter flying from Friday Harbor to Renton lost pitch control and crashed in Mutiny Bay, Washington, sinking. The pilot and nine passengers died. The NTSB found the horizontal stabilizer trim actuator clamp nut unthreaded in flight because a lock ring was missing.