AD 2012-06-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Rolls-Royce | Deutschland Ltd & Co KG Turbofan | Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines |
Unsafe Condition
Improper heat treatment of certain high-pressure (HP) turbine spanner retaining nuts after silver plating could result in HP turbine stage 2 disc failure, leading to uncontained engine failure and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the HP turbine spanner retaining nut from the combustion and HP turbine module and install a new one. Do not reinstall the removed nuts into any engine.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 20 flight cycles after the effective date of the AD or within 200 flight cycles since the last engine shop visit, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Deutschland Ltd & Co KG (RRD) turbofan engines: TAY 611-8 engines with serial numbers 16870, 16879, 16880, 16897, 18046, 18051, 18052, 18053, 18058, 18065, 18066, 18169, and 18194; and TAY 611-8C engine with serial number 85313.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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