Pilots’ actions after the bird strike are an early focus of the investigation, according to people familiar with the probe.

South Korea released a preliminary report into last month’s deadly Jeju Air Co. crash that offers more detail on the role of bird strikes in the disaster, while still leaving crucial questions unanswered.

Jet engines are incredibly powerful, complex pieces of precision engineering, running at the finest of tolerances; bird strikes can push these tolerances to the limits. When a bird is ingested into an engine, the first thing the unfortunate creature will meet is the fan blades, typically rotating between 2200 rpm and 4500 rpm.

The investigation into the deadliest air disaster on the country’s soil remains ongoing, the report made available on Monday said, focused on the role of ‘bird strike’ and involving an analysis of the

Korean investigators have confirmed that evidence of bird-strike was found in both engines of the Jeju Air Boeing 737-800 involved in the fatal landing accident at Muan airport. The inquiry has identified feathers and other debris as belonging to the Baikal teal,

South Korean authorities have submitted a preliminary report on last month's fatal Jeju Air crash to the International Civil Aviation Organization. The ongoing investigation focuses on a 'bird impact' as well as examining the aircraft's engines and landing systems.

The ill-fated Jeju Air plane in last month's deadly crash received a warning from air traffic control about bird activity just one minute before its black box recording stopped, the transport ministry said Saturday.