By Jack Kim and Lisa Barrington SEOUL (Reuters) -Both engines of the Jeju Air plane that crashed last month contained duck remains, according to a preliminary report on Monday, with authorities still trying to determine what caused the deadliest air disaster on South Korean soil.

A small American Airlines jet collided with a Sikorsky H-60 military helicopter on approach to Reagan Washington National Airport and crashed in to the Potomac River on Wednesday night.

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

Bird feathers and bloodstains were found in both engines of the Jeju Air plane that crashed in December, according to a preliminary investigation released Monday.

THREE passengers were injured when flames ripped through a South Korean commercial plane today, forcing the evacuation of all 176 people on board. An Air Busan plane burst into flames on the

Bereaved family members of the Jeju Air plane crash honor the victims through a joint ancestral rite -- also known as charye -- at the memorial altar set up for the plane crash victims at Muan International Airport on Wednesday,

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

Jeju Air Flight 2216's deadliest crash investigation has revealed the presence of bird feathers and blood in the plane engines.According to SCMP, the South Korean officials said on Monday, January 27,

An American Airlines regional passenger jet and a U.S. Army Black Hawk helicopter crashed into the frigid Potomac River, in Washington, D.C.

A midair collision near Reagan National Airport has raised questions about aviation safety protocols, following Donald Trump’s controversial hiring freeze on air traffic controllers just days prior.

The last deadly major crash involving a commercial airliner in the U.S. was in 2009, when 49 people — 45 passengers, 2 pilots and 2 flight attendants — aboard a Colgan Air flight crashed in New York state. One person also died on the ground.