Airworthiness Directives; Bell Helicopter Textron Canada Limited (BHTC) Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 Helicopters
airworthiness · Rule · Final rule; request for comments. · Published 2011-03-10 · Effective 2011-03-25 · 76 FR 13059
Document
Document number
2011-4465
Federal Register citation
76 FR 13059
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Publication date
2011-03-10
Effective date
2011-03-25
FAA docket
Docket No. FAA-2011-0079
Abstract
This document publishes in the Federal Register an amendment adopting Emergency Airworthiness Directive (AD) 2010-26-51, which was sent previously to all known U.S. owners and operators of the specified model helicopters by individual letters. This AD also supersedes existing AD 2009-08-03. This AD is prompted by another incident in which the tail rotor blade (blade) tip weight separated from a blade during flight causing vibration. This unsafe condition led to the determination that additional blades could be affected and should be added to the applicability. The actions specified by this AD are intended to prevent loss of the blade tip weight, loss of a blade, and subsequent loss of control of the helicopter.