Earlier in the month, South Korea's government imposed fines on three of the country's low cost carriers due to violations of safety regulations.
The three airlines - Jeju Air, T'way, and Air Seoul - were fined a total of around KRW 810 million (USD $682,000) by the South Korean Ministry of Land, Infrastructure, and Transportation (MOLIT).
Among the infractions were mechanical and communication errors, including a failure to comply with procedures after an aircraft braking system malfunctioned on a Jeju Air flight between Seoul and Qingdao, China in February.
Other infractions include Air Seoul cabin crew allegedly being "intoxicated" during a flight, along with pilots off Jeju Air and T'way taking off without air traffic control clearance.
In addition to fining the airlines, the South Korean MOLIT has also suspended the pilots involved.
A South Korean ministry official told Yonhap the aviation industry is facing "business difficulties" but negligence in safety management will not be tolerated.
Along with legacy carriers Asiana and Korean Air, South Korea has one of the most competitive markets for budget airlines serving a population of around 51 million people. There are currently six active low cost airlines: Jeju Air, T'way, Air Seoul, Air Busan, Eastar Jet, and Jin Air.
While South Korea has been supportive in new aviation ventures from entrepreneurs starting budget airlines, the country's government has stepped up restrictions and oversight on the highly competitive market. In 2018, it imposed new requirements for the entry of start-up airlines.