AD 2021-14-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | BMW Rolls-Royce GmbH and BMW Rolls-Royce Aero Engines | Various | Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by BMW Rolls-Royce GmbH and BMW Rolls-Royce Aero Engines) Turbofan Engines |
| engine | Rolls-Royce | GmbH and BMW Rolls-Royce Aero | Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by BMW Rolls-Royce GmbH and BMW Rolls-Royce Aero Engines) Turbofan Engines |
Unsafe Condition
HPT stage 1 blades failing in service due to sulphidation and subsequent crack initiation, due to contamination of the blade shank passing by the blade damper.
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Required Actions
Remove and replace the HPT stage 1 blade and HPT stage 1 blade damper. Before an affected HPT stage 1 blade exceeds 10,000 flight cycles (FCs) since first installation, replace the HPT stage 1 blade and HPT stage 1 blade damper. Installation of HPT stage 1 blades and HPT stage 1 dampers approved as eligible for installation in accordance with certain RRD service information is allowed.
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Compliance Time
Before an affected HPT stage 1 blade exceeds 10,000 flight cycles (FCs) since first installation.
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Affected Aircraft
RRD BR700-715A1-30, BR700-715B1-30, and BR700-715C1-30 model turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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