# Proposed AD FAA-2022-0515: CFM International, S.A. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-17-02
- Products: CFM International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 6, 2022, 87 FR 34221
- Comments due: July 21, 2022
- Became: [AD 2022-17-02](https://openairdocs.org/ad/2022-17-02)
- Docket: FAA-2022-0515 (https://www.regulations.gov/docket/FAA-2022-0515, where comments are filed)
- Project: AD-2022-00287-E
- FR document: 2022-11897
- Official PDF: https://openairdocs.org/files/sha256/c2/77/c277d40c471e74d5e2a9b53dc2a89e74d6e5f40d95ad94380f560ff7f90faf2e (from https://www.govinfo.gov/content/pkg/FR-2022-06-06/pdf/2022-11897.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/06/06/2022-11897/airworthiness-directives-cfm-international-sa-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-11897-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0515

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1B model turbofan engines. This proposed AD was prompted by multiple commanded in-flight shutdowns (IFSDs) due to inner radial drive shaft (RDS) failure. This proposed AD would require initial and repetitive inspections of the transfer gearbox (TGB) scavenge screens and, depending on the results of the inspections, replacement or rework of the affected inner RDS. As a mandatory terminating action to the initial and repetitive inspections of the TGB scavenge screens, this proposed AD would require replacement or rework of the affected inner RDS. This proposed AD would also prohibit the installation of an engine with an affected inner RDS onto an airplane that already has one engine with an affected inner RDS installed. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 6, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-11897, comments due Jul 21, 2022 (https://www.federalregister.gov/documents/2022/06/06/2022-11897/airworthiness-directives-cfm-international-sa-turbofan-engines)

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