Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce Deutschland GmbH, Formerly BMW Rolls-Royce GmbH) Turbofan Engines
airworthiness · Rule · Final rule. · Published 2021-07-08 · Effective 2021-08-12 · 86 FR 36064
Document
Document number
2021-14481
Federal Register citation
86 FR 36064
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2021-07-08
Effective date
2021-08-12
FAA docket
Docket No. FAA-2020-1174
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-710A1-10, BR700-710A2-20 and BR700-710C4-11 model turbofan engines. This AD was prompted by an investigation by RRD, which revealed a quality escape during the high-pressure turbine (HPT) stage 1 disk rim cooling air hole manufacturing process. This AD requires removing affected HPT disks from service prior to reaching specified compliance times or at the next engine shop visit, whichever occurs first. The FAA is issuing this AD to address the unsafe condition on these products.