AD 2001-19-52 Amendment 39-12470

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2001-19-52 which was sent previously to all known U.S. owners and operators of Bell Helicopter Textron Canada (BHTC) Model 222, 222B, 222U, and 230 helicopters by individual letters. This AD requires removing certain serial-numbered main rotor pendulum weight supports from service and replacing with airworthy main rotor pendulum weight supports. This AD is prompted by the failure of a main rotor pendulum weight support (support) resulting in shedding of the weights and an increased level of main rotor vibration. The actions specified by this AD are intended to prevent failure of a support, loss of a weight set resulting in main rotor vibration, and subsequent loss of control of the helicopter.