SEOUL, Jan 2 (Reuters) - South Korea's acting President

Choi Sang-mok said on Thursday immediate action must be taken if

a special inspection of all Boeing 737-800 aircraft operated in

the country finds any issues as authorities ramp up a probe into

Sunday's deadly air crash.

The conversion of data from the Jeju Air 7C2216 cockpit

voice recorder to audio file should be completed by Friday, Choi

told a disaster management meeting, which could provide critical

information on the final minutes of the doomed flight.

All 175 passengers and four of six crew members were killed

on Sunday when the Jeju Air jet belly-landed at Muan

International Airport in the country's southwest and slammed

into an earth-and-concrete embankment, bursting into flames.

Two crew members, located near the tail of the Boeing

737-800, survived.

"As there's great public concern about the same aircraft

model involved in the accident, the transport ministry and

relevant organisations must conduct a thorough inspection of

operation maintenance, education, and training," Choi said.

Choi's comments at the start of the meeting were provided by

his office.

Questions by air safety experts on what led to the deadly

explosion have focused on the embankment designed to prop up

navigation equipment that they said may have been built too

close to the end of the runway.

The aircraft's flight data recorder, which sustained some

damage, is being taken to the United States for analysis in

cooperation with the U.S. National Transportation Safety Board

(NTSB).

Investigators from the NTSB, U.S. Federation Aviation

Administration and the maker of the aircraft, Boeing ( BA ), are

in South Korea to help probe the worst air disaster in the

country.

Choi asked no effort be spared in helping the families of

the victims as the remains of those killed are handed over them.

He also asked the police to take action against anyone posting

"malicious" messages and fake news on social media related to

the disaster.