A Jeju Air flight from Seoul on Monday (Dec 30) was forced to return after encountering a landing gear problem, the airline said, a day after South Korea's most deadly plane crash.

The Boeing 737-800 involved in the latest incident was the same model as the Jeju Air plane that crashed on Sunday killing 179 people after coming down without its landing gear engaged.Jeju Air Flight 7C101, which departed Seoul's Gimpo International Airport for Jeju island "at around 6.37am (5.37am, Singapore time), returned to Gimpo at 7.25am" after a landing gear issue was detected shortly after takeoff, the South Korean airline said.

"Shortly after takeoff, a signal indicating a landing gear issue was detected on the aircraft's monitoring system," Song Kyung-hoon, head of the management support office at Jeju Air, told a news conference.

"At 6.57 am, the captain communicated with ground control, and after taking additional measures, the landing gear returned to normal operation. However, the decision was made to return to the airport for a thorough inspection of the aircraft."

Local media reported that 21 passengers chose not to board an alternate flight to Jeju, citing concerns over safety and other reasons.

Jeju Air's 41 plane fleet includes 39 Boeing 737-800 aircraft.

Seoul said on Monday it would conduct a special inspection of all 101 Boeing 737-800 planes in operation in the country, with United States investigators, possibly including from plane manufacturer Boeing, joining the probe into the crash.

AFP