Summary
We are adopting a new airworthiness directive (AD) for all Turbomeca S.A. Arriel 2B and 2B1 turboshaft engines. This AD was prompted by the discovery of non-conformities of certain power turbine (PT) blade fir-tree roots. This AD requires removing the affected PT blades from service on or before reaching a new reduced life limit for those certain PT blades. We are issuing this AD to prevent PT blade rupture, which could result in an uncommanded in-flight engine shutdown, forced autorotation landing, or accident.
Directive Details
AD Number
FAA-2012-0010
Document Number
2012-9789
Type
Rule
Publication Date
April 25, 2012
Effective Date
May 30, 2012
Affected Manufacturer
Turbomeca S.A. Turboshaft
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2012-0010
Topics
Official Documents
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