SEOUL, Jan 13 (Reuters) - South Korea plans to improve

the structures housing the antenna that guide landings at its

airports this year following December's fatal crash of a Jeju

Air plane, which skidded off the runway and burst into flames

after hitting such a structure.

The transport ministry, which has been inspecting safety

conditions at airlines and airports since the Boeing 737-800 jet

crashed at the southwestern Muan airport, announced the move to

change the so-called "localizer" structures on Monday.

Seven domestic airports, including Muan, were found to have

embankments or foundations made of concrete or steel that needed

to be changed, the ministry said in a statement.

It added that it would prepare measures to improve the

structures by this month and aim to complete the improvements by

the end of 2025.

The government has also finished its inspection of six

domestic airlines flying Boeing 737-800s, and found violations

at some operators including exceeding the period of inspection

pre- and post-flight, and non-compliance with procedures to

resolve plane defects or passenger boarding.

The transport ministry did not immediately respond to a

request for comment on whether Jeju Air was among

the airlines where violations were found. A Jeju Air

spokesperson could not be immediately reached.

A special safety inspection of the country's major airport

facilities will also take place between Jan 13-21, the ministry

statement said.