# Proposed AD FAA-2021-0791: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-26-22
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 6, 2021, 86 FR 55545
- Comments due: November 22, 2021
- Became: [AD 2021-26-22](https://openairdocs.org/ad/2021-26-22)
- Docket: FAA-2021-0791 (https://www.regulations.gov/docket/FAA-2021-0791, where comments are filed)
- Project: AD-2021-00716-E
- FR document: 2021-21643
- Official PDF: https://openairdocs.org/files/sha256/c8/49/c849c1954950d2cd275821998a27c270bcf1e731346a3e8e0d50a08207a59081 (from https://www.govinfo.gov/content/pkg/FR-2021-10-06/pdf/2021-21643.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/10/06/2021-21643/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AEBEC57C0B8FA4D8862587660057C9CC.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0791

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2020-20-13, which applies to certain General Electric Company (GE) CF6- 80A and CF6-80C model turbofan engines. AD 2020-20-13 requires ultrasonic inspection (UI) of high-pressure turbine (HPT) stage 1 and stage 2 disks and replacement of any HPT stage 1 or stage 2 disk that fails the inspection. Since the FAA issued AD 2020-20-13, the manufacturer determined that the requirement to perform UI of affected HPT stage 1 and stage 2 disks should be expanded to include an additional population of affected HPT stage 1 and stage 2 disks. This proposed AD would retain the required UI while expanding the population of affected HPT stage 1 and stage 2 disks. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 6, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-21643, comments due Nov 22, 2021 (https://www.federalregister.gov/documents/2021/10/06/2021-21643/airworthiness-directives-general-electric-company-turbofan-engines)

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