ATR, the maker of turboprop aircraft, won a $100 million aircraft order from Bangkok Airways PCL, the first plane deal announced at the ongoing Singapore Airshow.

The contract is for four additional ATR 72-600s, according to a statement distributed after Bangkok Airways signed the deal in Singapore. The airline, which operates a fleet of 15 ATR planes, is also considering placing an order for more than 20 narrowbody planes possibly this year to replace some of its Airbus jets, Chief Financial Officer Anawat Leelawatwatana said in an interview.

The Singapore airshow was devoid of any plane orders on the first day Tuesday. Planemakers Airbus SE and Boeing Co. typically use airshows in Farnborough, Paris or Dubai to announce several large contracts they win from airlines.