The Boeing KC-46 test program completed flight flutter tests on EMD 1 - an integral part of the certification process of any new aircraft program to ensure the design is structurally sound.

Boeing KC-46 program completes flutter tests 

Flutter testing is a prime requisite for aircraft capabilities testing. Successful completion of flutter testing enables an expanded flight envelope and the ability to safely put more crew on board for further testing. The KC-46 flutter tests included the Wing Aerial Refueling Pods (WARP) and a stowed refueling boom.