Flight TG 281, connecting Bangkok and the popular tourist island, left Suvarnabhumi at 7.45am but had to turn back after the captain discovered problems with the landing gear. The plane landed safely at the airport at 8.47am.
Passengers were transferred to a new plane. They arrived at Samui airport at 10.10am.
Mrs Raweewan said THAI engineers were inspecting the plane's landing gear.