The preliminary report was released by the Aviation and Railway Accident Investigation Board on Monday in South Korea.

The investigation into the deadliest air disaster on the country's soil remains ongoing, focusing on the role of bird strike and involving an analysis of the engines and the "localizer" landing guidance structure.

South Korea’s authorities investigating last month’s Jeju Air plane crash have submitted a preliminary accident report to the UN aviation agency and to the authorities of the United States, France and Thailand,

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

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South Korean officials investigating the fatal Jeju Air crash have published a preliminary report of the accident.

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.

Both engines of the Jeju Air plane that crashed last month contained duck remains, according to a preliminary report.

The exact cause of the Jeju Air crash remains unclear, and the investigation is complicated because the black boxes stopped recording four minutes before impact.