# Proposed AD FAA-2021-0874: Rolls-Royce Corporation (Type Certificate Previously Held by Allison Engine Company) Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-01-04
- Products: Rolls-Royce
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 12, 2021, 86 FR 56660
- Comments due: November 26, 2021
- Became: [AD 2022-01-04](https://openairdocs.org/ad/2022-01-04)
- Docket: FAA-2021-0874 (https://www.regulations.gov/docket/FAA-2021-0874, where comments are filed)
- Project: AD-2021-00668-E
- FR document: 2021-22091
- Official PDF: https://openairdocs.org/files/sha256/45/9e/459e7b53b3404f96b68a326dd8ac7365119a29393759747aadcba53fc7cdbdb3 (from https://www.govinfo.gov/content/pkg/FR-2021-10-12/pdf/2021-22091.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/10/12/2021-22091/airworthiness-directives-rolls-royce-corporation-type-certificate-previously-held-by-allison-engine
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3DD24066524EF5118625876C004B9374.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0874

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Rolls-Royce Corporation (RRC) AE 2100D3 model turboprop engines. This proposed AD was prompted by an in-flight shutdown (IFSD) of an engine and subsequent investigation by the manufacturer that revealed a crack in the 3rd-stage compressor wheel. This proposed AD would require replacement of the affected 3rd-stage compressor wheel. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 12, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-22091, comments due Nov 26, 2021 (https://www.federalregister.gov/documents/2021/10/12/2021-22091/airworthiness-directives-rolls-royce-corporation-type-certificate-previously-held-by-allison-engine)

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