# Proposed AD FAA-2020-0729: CFM International, S.A. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-25-13
- Products: CFM International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 24, 2020, 85 FR 44798
- Comments due: September 8, 2020
- Became: [AD 2020-25-13](https://openairdocs.org/ad/2020-25-13)
- Docket: FAA-2020-0729 (https://www.regulations.gov/docket/FAA-2020-0729, where comments are filed)
- Project: AD-2020-00620-E
- FR document: 2020-16042
- Official PDF: https://openairdocs.org/files/sha256/2b/74/2b747efd433d6ed504ea18dbf50c96cba20614e5c3bba72b96b254b7fe720047 (from https://www.govinfo.gov/content/pkg/FR-2020-07-24/pdf/2020-16042.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/07/24/2020-16042/airworthiness-directives-cfm-international-sa-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/04D0E193D9196CDA862585AF00421BEF.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0729

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain CFM International, S.A. (CFM) LEAP-1A23, LEAP-1A24, LEAP- 1A24E1, LEAP-1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, LEAP-1A35A model turbofan engines. This proposed AD was prompted by an investigation by CFM that showed a subsurface anomaly in a part manufactured using the same material as the LEAP-1A high-pressure turbine (HPT) stage 2 disk. This proposed AD would require an ultrasonic inspection (UI) of the HPT stage 2 disk and replacement of any HPT stage 2 disk that fails the UI with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jul 24, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-16042, comments due Sep 8, 2020 (https://www.federalregister.gov/documents/2020/07/24/2020-16042/airworthiness-directives-cfm-international-sa-turbofan-engines)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.