successfully completed its maiden voyage on Friday 14 June 2013 in France.
Within few days of its first flight , Sri Lankan Airlines ordered four of these most modern A350-900 planes from Airbus.
In the $2.6 billion sale, Sri Lankan will purchase six Airbus A330-300s and four A350-900s directly from Airbus and will lease a further three A350s as production lots are not available at the moment to buy outright.
Deliveries of the A330s will begin in October 2014 and of the A350s in 2017.
The heavy fuel burner A340s would, said Sri Lankan CEO Kapila Chandrasena, be returned to the lessor as the new aircraft arrived.
A350 is 20-25% efficient and cheaper to operate than four engined A340s . This will considerably reduce the unbearable fuel cost of UL and take it back to profit making level.
A350XWB will join commercial passenger operations in 12-13 months with Qatar airways.

http://www.airbus.com/newsevents/news-events-single/detail/srilankan-airlines-opts-for-six-a330s-and-four-a350-xwbs/#