As investigators look into what caused Jeju Air Flight 7C2216 to crash, the airline has come under intense government and public scrutiny for how it operates. Some of its operational practices are being challenged, including how it flew its planes more frequently than competitors and how it outsourced its maintenance overseas.

South Korean authorities have extended the closure of a southwestern airport where a Jeju Air plane crashed and killed 179 people onboard, the land ministry said Monday.