Malaysia Airlines subsidiary MASwings plans to order six new aircraft to replace its DHC-6 Twin Otter fleet.
The carrier has identified Viking Air's Twin Otter Series 400, GECI Aviation's Skylander SK-105 and Ruag Aviation Doriner 228 New Generation as possible replacement aircraft, said a spokesman.
The fleet renewal programme will start once approval is obtained from the government.
"MASwings plans to replace the aging Twin Otter with brand new similar aircraft to upgrade the service facility in the interiors of Sabah and Sarawak," said the spokesman, adding that with the fleet renewal, the carrier will also be able to increase frequency on existing routes and provide medical evacuation charter when required.
In February, the airline launched a twice-daily Kota Kinabalu-Bandar Seri Begawan, daily Kuching-Pontianak and daily Tawau-Tarakan services using ATR 72-500s.
It also recently replaced aging Fokker 50s with new ATR 72-500 turboprops.
The carrier now has a fleet of four Twin Otters and 10 ATR 72-500S.