South Korean carriers Air Busan, Air Incheon, Asiana Airlines, Eastar Jet, Jeju Air, Jin Air, Korean Air, and T'way Air have voluntarily signed an agreement with the country's Ministry of Land, Infrastructure, & Transport (MLIT) in which they have pledged to replace any aircraft in their fleets that are older than twenty years of age.

The convention aims to improve the country's overall safety standard as well as enhance fuel efficiency.

The MLIT said that of the 264 jets owned and operated by South Korea's eight commercial carriers only fourteen were older than twenty years of age including: Korean Air with four B747-400s; Asiana with two B767-300s and six B747-400(F)s; and Air Incheon with two B737-400(F)s.