Airworthiness Directives; Raytheon Aircraft Company Models 1900, 1900C, and 1900D Airplanes

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This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Raytheon Aircraft Company Models 1900, 1900C, and 1900D airplanes. The proposed AD would require inspecting the main landing gear hydraulic actuators to determine whether a certain Frisby Aerospace actuator is installed, and reworking or replacing any of these Frisby Aerospace actuators. The proposed AD is the result of reports of fatigue cracks in the end cap of main landing gear hydraulic actuators manufactured by Frisby Aerospace and installed on the affected airplanes. The actions specified by the proposed AD are intended to prevent the main landing gear from not locking down due to the hydraulic actuator cracking and separating, which could result in loss of control of the airplane during landing, taxi, or ground operations.