Summary
We are adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland (RRD) Models Tay 611-8 and Tay 611-8C turbofan engines. This AD requires replacement of the high-pressure (HP) turbine spanner retaining nut. This AD was prompted by the discovery that certain HP turbine spanner retaining nuts were improperly heat treated after application of silver plating. We are issuing this AD to prevent failure of the HP turbine stage 2 disc, uncontained engine failure, and damage to the airplane.
Directive Details
AD Number
FAA-2012-0288
Document Number
2012-6995
Type
Rule
Publication Date
March 23, 2012
Effective Date
March 23, 2012
Affected Manufacturer
Rolls-Royce Deutschland Ltd & Co KG Turbofan
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2012-0288
Topics
Official Documents
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