Mexican low-cost carrier VivaAerobus has taken delivery of the first of 52 Airbus A320 family aircraft. The order, which was placed in 2013, included 12 A320ceos and 40 A320neos and was the largest single deal by a Mexican customer.

VivaAerobus currently operates six leased A320s and will become an all Airbus operator as it completes its fleet transition from Boeing 737-300s by early 2016.

All VivaAerobus’ A320ceos are powered by IAE engines. The A320neo will be powered by Pratt and Whitney engines. The aircraft will be deployed on the airline’s domestic network and international routes to the US.

“Our new fleet of A320s will enable VivaAerobus to continue enhancing our operational efficiencies by lowering our costs and fares for our passengers, while offering a significant upgrade with the A320 cabin comfort,” VivaAerobus CEO Juan Carlos Zuazua said.

VivaAerobus is part-owned by IAMSA and Irelandia Aviation.

According to Airbus, the A320neo program has 345 firm orders from six customers in Latin America.