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

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

Investigators found bird blood and feathers in both engines of the Jeju Air Boeing 737 that crashed in Seoul, killing 179 people.

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Black box silence adds mystery to the Jeju Air crash killing 179. A report reveals a bird strike just before the deadly accident.

The first report on last month's Jeju Air crash in South Korea confirmed traces of bird strikes in the plane's engines, though officials haven't determined the cause of the accident that killed all but two of the 181 people on board.

SEOUL: Investigators have found evidence of a bird strike in the crash of a Jeju Air passenger plane in South Korea in December, which resulted in 179 fatalities.Feathers and blood stains discover

SEOUL: Both engines of the Jeju Air plane that crashed last month contained duck remains, according to a preliminary report on Monday (Jan 27), with authorities still trying to determine what caused the deadliest air disaster on South Korean soil.

South Korean authorities will increase their scrutiny of the country's low-cost airline sector, including tightening the criteria for MRO workers and enforcing stricter rules on network expansion.

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.

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.