Middle Eastern carrier Yemenia has selected International Aero Engines V2500 powerplants for the 10 Airbus A320s it ordered earlier this year.
The agreement, disclosed during the Farnborough Air Show, includes a long-term aftermarket support contract.
Deliveries are set to begin next year, says the engine manufacturer.
IAE values the overall agreement at around $300 million.
It says Yemenia's requirements included a need for hot-and-high performance given the altitude of the capital Sana'a International Airport.
Yemenia chairman Abdulkalek Al-Kadi says the engine "has demonstrated a clear performance advantage operating in the difficult environments at our home base".
The airline already has the rival CFM International CFM56 powerplant fitted to its Boeing 737-800 fleet.
Yemenia's V2500 will be the SelectOne production version.
IAE states that SelectOne has clocked up 1 million flight hours, and some 500,000 cycles, over 20 months of service, since the powerplant was first introduced with Indian carrier IndiGo in October 2008.