T'way Air's flight bound for Incheon from Singapore has been delayed due to a safety inspection issue involving its aircraft, the South Korean budget airline said Sunday.T'way's flight TW172 took off from Singapore's Changi Airport for South Korea's Incheon International Airport at 2:15 a.m. (local time) with 285 passengers aboard, but returned to the point of departure 55 minutes later due to the aircraft's safety issues, according to company officials.Following a check, T'way determined the aircraft, an Airbus A330-300, is unfit for immediate aviation and sent a different aircraft from South Korea to Changi Airport as a replacement.The replacement flight is set to take off from Changi Airport at around 11 p.m., resulting in a delay of about 21 hours.T'way said it offered TW172 passengers a stay at a hotel near Changi Airport and plans to give out additional compensation for the incident."We are sorry to cause a big inconvenience due to an unexpected safety check," an official at the airline said.In June, the low-cost carrier was ordered to come up with measures to address repeated safety and flight delay issues by South Korea's Ministry of Land, Infrastructure and Transport following a series of international flight delays.Source: Yonhap News Agency