A350 XWB testing: MSN2 and MSN4 take flight!

The number of flying A350 XWB test aircraft doubled from two to four on 26 February 2014 with the simultaneous maiden flights of MSN2 and MSN4 - both of which were performed from Toulouse, France. MSN2 is the first developmental aircraft to feature a full passenger cabin, allowing Airbus to begin validating all related systems; while MSN4 will be used for multiple test activities - including low-weight flight envelope certification and external noise measurements among others.