Airworthiness Directives; Boeing Model 757 Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 757 series airplanes, that requires revising the maintenance program to require verification that a certain shipping container and shipping sleeve assembly were used in shipping the ram air turbine (RAT) deployment actuator. This amendment also requires inspection of the identification plate on the RAT deployment actuator to determine the actuator serial numbers or a records check to determine such information; and repair or replacement of certain RAT deployment actuators, if necessary. This amendment is prompted by reports of certain RAT actuators that failed to deploy upon command due to interference in the actuator locking mechanism caused by damage incurred during shipping of the actuators. Failure of the RAT to deploy, specifically during a dual engine failure, would result in loss of hydraulic power and would adversely affect the continued safe flight and landing of the airplane.