Airworthiness Directive · Amendment 39-12437 · McDonnell Douglas Model 717 Series Airplanes
McDonnell Douglas Model 717 Series Airplanes
Model 717 series airplanes, as listed in Boeing Alert Service Bulletin 717-27A0016, including Appendix, dated April 9, 2001; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain McDonnell Douglas Model 717 series airplanes. This action requires a one-time inspection of the support seal tubes of the rudder trim and load-feel actuator assembly of the rudder trim control system, located in the aft accessory compartment, for proper clearance between the actuator support seal tube and spring capsule assembly, and applicable follow-on/corrective actions. This action is necessary to detect and correct the accumulation of moisture in the rudder trim and load-feel actuator of the rudder trim control system. Such moisture could freeze and cause stiff operation, binding, or jamming of the rudder trim control system and consequent jamming of the rudder; and adversely affect directional control of an airplane.
