Airworthiness Directives; Turbomeca Arriel 2B and 2B1 Turboshaft Engines
airworthiness · Rule · Final rule; request for comments. · Published 2005-12-13 · Effective 2005-12-28 · 70 FR 73579
Document
Document number
05-23831
Federal Register citation
70 FR 73579
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Turbomeca Arriel 2B and 2B1 Turboshaft
Publication date
2005-12-13
Effective date
2005-12-28
FAA docket
Docket No. FAA-2005-22928
Abstract
The FAA is adopting a new airworthiness directive (AD) for Turbomeca Arriel 2B and 2B1 turboshaft engines without modification TU22 incorporated. This AD requires initial and repetitive visual checks of the free turbine shield for cracks. This AD results from reports of several free turbine shields found with large circumferential cracks. We are issuing this AD to prevent failure of the free turbine shield, leading to engine misalignment, in-flight engine shutdown, emergency autorotation landing, or accident.