Airworthiness directives › 2023-04-14
AD 2023-04-14 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
Applicability*9
This AD applies to Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent XWB-75, Trent XWB-79, Trent XWB-79B, Trent XWB-84, and Trent XWB-97 model turbofan engines as identified in European Union Aviation Safety Agency (EASA) AD 2022-0129, dated June 30, 2022. (EASA AD 2022-0129).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Perform all required actions within the compliance times specified in, and in accordance with, EASA AD 2022-0129.
Unsafe condition
This AD was prompted by analysis by the manufacturer of the low-pressure compressor (LPC) outlet guide vane (OGV) assembly and LPC OGV outer mount ring assembly. The analysis predicted that when the front engine mount is in the fail-safe condition, the most highly stressed LPC OGV assembly has a life that could be substantially less than one shop visit interval. The FAA is issuing this AD to prevent failure of the front engine mount support structure. The unsafe condition, if not addressed, could result in engine separation, reduced control of the airplane, and loss of the airplane.
Affected ADs
This AD replaces AD 2020-12-01, Amendment 39-21135 (85 FR 34959, June 8, 2020) (AD 2020-12-01).
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