Air travel is still considered one of the safest modes of transportation, yet incidents do raise a concern regarding the safety of aviation. Accidents like Jeju Air Flight 2216 that crashed in South Korea and the DHC-3 Turbine Otter that crashed in Washington, USA, can be attributed to some of these causes, including bird strikes, mechanical failures, and human errors. It reviews such incidents and others to determine their causes and lessons in enhancing the safety of aviation.