This is reported by Yonhap.
The aircraft, which took off from Gimpo International Airport to Jeju at 6:37 local time, detected a problem shortly after departure.
The airline informed the 161 passengers of a mechanical defect and subsequently returned the flight to the airport at 7:25.
The passengers were transferred to an alternative plane, however, 21 passengers decided not to board due to safety concerns.
According to Jeju Air representative Song Kyun-ho, the flight captain contacted the dispatch center after noticing a signal indicating an issue with the landing gear.
“Although additional measures confirmed that the landing gear was functioning normally, the captain decided to return to the airport for a safety check,” he stated.
Overall, the country's government decided to conduct a safety inspection of all Boeing 737-800 aircraft operated by South Korean airlines following the fatal Jeju Air crash.
On Sunday, December 29, a Jeju Air plane was landing at Muan Airport but went off the runway and crashed into a concrete wall, igniting a fire.
Only two of the 181 people on board were rescued, while the others perished.
Officials believe that a landing gear failure could have caused the accident, likely due to a bird strike. An investigation has begun at the site to determine the exact cause.