# Proposed AD FAA-2021-0381: 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 2021-17-11
- Products: Rolls-Royce Deutschland
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 28, 2021, 86 FR 28716
- Comments due: July 12, 2021
- Became: [AD 2021-17-11](https://openairdocs.org/ad/2021-17-11)
- Docket: FAA-2021-0381 (https://www.regulations.gov/docket/FAA-2021-0381, where comments are filed)
- Project: MCAI-2020-01656-E
- FR document: 2021-11158
- Official PDF: https://openairdocs.org/files/sha256/a5/38/a5384d3870d1b8368060edd7aef71087a870d22ab35757ff135200f53db0b7f4 (from https://www.govinfo.gov/content/pkg/FR-2021-05-28/pdf/2021-11158.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/05/28/2021-11158/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/30A43C19BFC5F09C862586E30068EC86.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0381

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Trent XWB-75, Trent XWB-79, Trent XWB-79B, and Trent XWB-84 model turbofan engines. This proposed AD was prompted by reports

((Page 28717))

of cracks in the intermediate-pressure compressor (IPC) rotor 1 (R1) blades installed on certain Trent XWB model turbofan engines. This proposed AD would require initial and repetitive borescope inspections (BSIs) of the affected IPC R1 blades and, depending on the results of the inspections, replacement of all 34 IPC R1 blades. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 28, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-11158, comments due Jul 12, 2021 (https://www.federalregister.gov/documents/2021/05/28/2021-11158/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-type-certificate-previously-held-by)

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