AD 2011-15-51
Effective 11/14/2011 · Published 10/27/2011
Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Model 407 and 427 Helicopters
Summary
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2011-15-51, which was sent previously to all known U.S. owners and operators of the specified Bell Model 407 and 427 helicopters by individual letters. This AD requires inspecting certain hydraulic servo actuators to determine whether the shaft turns independently of the nut or the clevis assembly. If the shaft turns i…