People in South Korea are reeling from Sunday's deadly plane accident. The government says it plans to probe all domestic aircraft of the same model as the one that crashed at an airport in the country's southwest.

The government says there are 101 of the planes owned by six domestic airlines. Officials want to check the engines as well as landing gear.

The Boeing 737 crashed at Muan International Airport on its way from Bangkok. The plane, operated by South Korean low-cost carrier Jeju Air, was carrying 181 people. Only two survived.

Officials say the flight data recorder found at the site is partially damaged.

Yonhap News Agency quoted a South Korean investigation board member as saying that decoding the recorder could take a month.

They say they will plan to work with US authorities to investigate the crash. Staff from the US National Transportation Safety Board will join the probe to help analyze the flight data and cockpit voice recorders retrieved from the jet.

The NTSB says they are preparing an investigation with Boeing and the FAA, US Federal Aviation Administration. Boeing says the company is in contact with Jeju Air, and stands ready to support them.

South Korean media outlets say the plane touched down without landing gear deployed shortly after the pilot of the aircraft declared mayday. They say the crash is the deadliest-ever aviation accident on the country's soil.

A memorial has been set up at a gymnasium near the airport. Many people are paying respects to the victims there, including Acting President and Deputy Prime Minister Choi Sang-mok, the National Assembly speaker and other lawmakers.

A man whose daughter was on the plane said: "It was a horrible and shocking accident. I never imagined something like this could happen to my daughter. I just can't believe it."

Acting President Choi declared a seven-day period of national mourning through January 4 at an emergency meeting of relevant government officials on Sunday night.

A group of victims' families says they are asking the airline and authorities to set up a memorial at the airport's terminal.