Rockwell Collins has been selected by Airbus to provide Trimmable Horizontal Stabilizer Actuator (THSA) for the new A350 XWB (Xtra Wide-Body) aircraft. The Cedar Rapids, Iowa-based company said the THSA optimizes aerodynamics responding to complex computations to trim the pitch of the aircraft during flight. The Rockwell Collins THSA incorporates two independent means of drive and redundant failure detection technology meeting the certification requirements.