Airworthiness Directives; Bell Helicopter Textron Canada Limited
airworthiness · Rule · Final rule. · Published 2015-06-09 · Effective 2015-07-14 · 80 FR 32458
Document
Document number
2015-13852
Federal Register citation
80 FR 32458
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2015-06-09
Effective date
2015-07-14
FAA docket
Docket No. FAA-2013-0489
Abstract
We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited (Bell) Model 206L-1, 206L-3, and 206L-4 helicopters. This AD requires installing a placard and revising the limitations section of the rotorcraft flight manual (RFM). This AD was prompted by several incidents of third stage engine turbine wheel failures caused by excessive vibrations at certain engine speeds during steady-state operations. The actions of this AD are intended to prevent turbine failure, engine power loss, and subsequent loss of control of the helicopter.