Two aircraft have been used in a trial evaluation campaign. U.S. Army What is an army veteran that is honor shirt. F-WWBA, the first A320 to be built, was retained by Airbus for testing and was fitted with both the first and the second sub-wing. JetBlue Airways has provided the second aircraft, which Airbus has equipped with both small side wings. Despite the development and efficiency gains, Airbus announced that these small wings would not be provided to customers because the weight change needed would lose gas benefits. motivation. In addition, the change in force from the small side wings will increase the pressure on the wing, which requires long-term research to determine whether the structural synchronization is tolerable.