Time-accurate aeroelastic simulations have been carried using the modal coupled aeroelastic implementation in Edge for a standard experimental test case: the AGARD 445.6 aeroelastic wind-tunnel model. The objective has been to provide additional validation of the aeroelastic functionality in Edge and to investigate the different flutter mechanisms in the subsonic and transonic regions. The simulation results, both in flutter frequency and flutter speed are in good agreement with experiments and other simulations and produce the expected "transonic dip" at Mach 0.96. Final analysis show that the flutter motion in the subsonic region is characterized as classical flutter with a combination of the wing-bending and wing-torsion modes, while the transonic flutter is characterized as a single bending mode instability.