Summary
This document proposes to supersede Airworthiness Directive (AD) 75-24-07 R1, which currently requires repetitively inspecting the left-hand (LH) rudder bar assembly for cracks and loose fasteners on certain Pilatus Britten-Norman Ltd. BN-2A and BN-2A Mk 111 series airplanes, and replacing any cracked part. The Federal Aviation Administration's policy on aging commuter-class aircraft is to eliminate certain repetitive short-interval inspections when improved parts or modifications are available. The proposed action would require inspecting the LH rudder bar assembly, determining the wall thickness of the slider tube unit, modifying the rudder bar assembly by replacing the LH slider tube with a new strengthened slider tube unit as terminating action for the repetitive inspections that are currently required by AD 75-24-07 R1. The actions specified in the proposed AD are intended to prevent failure of the pilot's rudder bar assembly, which, if not detected and corrected, could result in loss of control of the airplane.