There were 211 passengers on board the Boeing 777-300ER, which made an emergency landing in Bangkok.
Lee Hsien Loong, 72, bows out after 20 years in the city-state’s top job in a carefully calibrated power transfer.
The 51-year-old will be sworn in as the city-state’s fourth leader since 1965 in a ceremony on May 15.
Prime Minister-in-waiting Lawrence Wong says residents are looking for more out of life than material success.