Airworthiness Directives; Rosemount Aerospace, Inc. Pitot Probes

We are adopting a new airworthiness directive (AD) for Rosemount Aerospace Model 851AK pitot probes that were repaired by CSI Aerospace, Inc. between January 2013 and July 2014 that are installed on airplanes. This AD was prompted by a report that certain pitot probes are indicating the wrong airspeed during flight. This AD requires inspecting the airplane to determine the number of affected pitot probes installed and replacing the affected pitot probes. We are issuing this AD to address the unsafe condition on these products.