# Proposed AD FAA-2022-0094: CFM International, S.A. Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-11-02
- Products: CFM International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 15, 2022, 87 FR 8434
- Comments due: April 1, 2022
- Became: [AD 2022-11-02](https://openairdocs.org/ad/2022-11-02)
- Docket: FAA-2022-0094 (https://www.regulations.gov/docket/FAA-2022-0094, where comments are filed)
- Project: AD-2021-01251-E
- FR document: 2022-03041
- Official PDF: https://openairdocs.org/files/sha256/8f/4d/8f4d6d319bd8b8ce134a67ff1406b71d5575671513878e665506845e9c990993 (from https://www.govinfo.gov/content/pkg/FR-2022-02-15/pdf/2022-03041.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/02/15/2022-03041/airworthiness-directives-cfm-international-sa-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-03041-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0094

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all CFM International, S.A. (CFM) LEAP-1B21, LEAP-1B23, LEAP-1B25, LEAP-1B27, LEAP-1B28, LEAP-1B28B1, LEAP-1B28B2, LEAP-1B28B2C, LEAP- 1B28B3, LEAP-1B28BBJ1, and LEAP-1B28BBJ2 model turbofan engines. This proposed AD was prompted by the detection of melt-related freckles in the billet, which may reduce the life of certain compressor rotor stages 6-10 spools, high pressure turbine (HPT) rotor mid seals, HPT rotor stage 2 disks, low pressure turbine (LPT) stage 2 disks, and LPT stage 3 disks. This proposed AD would require revising the airworthiness limitations section (ALS) of the applicable CFM LEAP-1B Engine Shop Manual (ESM), and the operator's existing approved continuous airworthiness maintenance program (CAMP) to incorporate reduced life limits for these parts. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 15, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-03041, comments due Apr 1, 2022 (https://www.federalregister.gov/documents/2022/02/15/2022-03041/airworthiness-directives-cfm-international-sa-turbofan-engines)

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