Summary
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.
Directive Details
AD Number
FAA-2013-0489
Document Number
2015-13852
Type
Rule
Publication Date
June 9, 2015
Effective Date
July 14, 2015
Affected Manufacturer
Bell Helicopter Textron Canada Limited
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2013-0489
Topics
Official Documents
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