# Proposed AD FAA-2022-0150: Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-11-15
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 1, 2022, 87 FR 11355
- Comments due: April 15, 2022
- Became: [AD 2022-11-15](https://openairdocs.org/ad/2022-11-15)
- Docket: FAA-2022-0150 (https://www.regulations.gov/docket/FAA-2022-0150, where comments are filed)
- Project: MCAI-2021-00839-E
- FR document: 2022-04276
- Official PDF: https://openairdocs.org/files/sha256/d1/23/d12385d459cc66dde2046a5d65ea9c700cb7bfc178bc8c63d602acd47dd5f9e2 (from https://www.govinfo.gov/content/pkg/FR-2022-03-01/pdf/2022-04276.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/03/01/2022-04276/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-04276-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0150

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd. & Co KG (RRD) Trent 7000-72 and Trent 7000-72C model turbofan engines. This proposed AD was prompted by in-service experience showing that certain high-pressure turbine (HPT) blades may prematurely deteriorate to an unacceptable condition when managed in accordance with the inspection intervals in the Time Limits Manual (TLM). This proposed AD would require initial and repetitive on- wing borescope inspections (BSIs) of the HPT blades to detect axial cracking and, depending on the results of the inspections, replacement of the HPT blade set, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). This proposed AD would also require replacement of the HPT blade set before exceeding a specified number of flight cycles. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 1, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-04276, comments due Apr 15, 2022 (https://www.federalregister.gov/documents/2022/03/01/2022-04276/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by)

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