Airworthiness Directives; Eclipse Aviation Corporation Model EA500 Airplanes

We are adopting a new airworthiness directive (AD) that supersedes AD 2007-13-11, which applies to all Eclipse Aviation Corporation (Eclipse) Model EA500 airplanes. AD 2007-13-11 was prompted by reports of loss of primary airspeed indication due to freezing condensation within the pitot system. AD 2007-13-11 requires operational limitations consisting of operation only in day visual flight rules (VFR), allowing only a VFR flight plan, and maintaining operation with two pilots. Since we issued AD 2007-13-11, Eclipse developed a design modification to the pitot/angle-of-attack (AOA) system to eliminate the possibility of freezing condensation within the pitot/AOA system. Eclipse is incorporating this modification during production on Model EA500 airplanes starting with serial number (S/N) 000065. Consequently, this AD limits the applicability to airplanes under S/N 000065 and requires incorporating the modification. This AD also retains the operating limitations in AD 2007-13-11 until the modification is incorporated. We are issuing this AD to prevent long- term reliance on special operating limitations when a design change exists that will eliminate the need for the operating limitations. Incorporating the modification will prevent loss of air pressure in the pitot system, which could cause erroneous AOA and airspeed information with consequent loss of control.