The crash was not due to "any maintenance issues", the head of Jeju Air's management team says.
According to the Yonhap news agency, Song Kyung-hoon told a press briefing: "There are areas we have to investigate further by determining the exact cause of the crash."
He adds that there is a schedule for maintenance checks and that they leave "no stone unturned" regarding maintenance work ahead of take-offs. Kyung-hoon also says the company's insurance plan should be able to support the victims and their families, Yonhap reports.
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Emergency tents set up to provide privacy for grieving families
Dozens of emergency tents have been put up in the airport’s departure hall.
Grieving families have been taking shelter inside. I’ve seen some of them holding each other and wailing.
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I woke up and I’d already been rescued, says survivor
We’re now hearing from a survivor - one of only two people who made it out alive from the plane crash.
The 33-year-old flight attendant from the Jeju Air plane told doctors he had already been rescued when he woke up, according to news agency Yonhap, which quoted hospital director Ju Woong.
He was first taken to a hospital in Mokpo, about 25km (15.5 miles) south of the airport, but was later transferred to Ewha Womans University Seoul Hospital in the capital.
“He’s fully able to communicate,” Ju said. "There's no indication yet of memory loss or such."
The survivor, who suffered multiple fractures, is receiving special care due to the risk of after-effects, including total paralysis, the news agency added.
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Seven-day mourning period announced for South Korea
Flags at government offices will be lowered and civil servants will wear black ribbons.
The government has declared a period of national mourning for the country for the next seven days.