# Proposed AD FAA-2020-0592: General Electric Company Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-25-10
- Products: General Electric
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 12, 2020, 85 FR 35816
- Comments due: July 27, 2020
- Became: [AD 2020-25-10](https://openairdocs.org/ad/2020-25-10)
- Docket: FAA-2020-0592 (https://www.regulations.gov/docket/FAA-2020-0592, where comments are filed)
- Project: AD-2020-00251-E
- FR document: 2020-12650
- Official PDF: https://openairdocs.org/files/sha256/7f/22/7f222e0f5585854ad7115969c626867e9845e4b0edb768f620e6bc7bf5c6cb47 (from https://www.govinfo.gov/content/pkg/FR-2020-06-12/pdf/2020-12650.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/06/12/2020-12650/airworthiness-directives-general-electric-company-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E348717F83CA962286258585003FE176.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0592

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all General Electric Company (GE) GEnx-1B64/P2, GEnx-1B67/P2, GEnx- 1B70/75/P2, GEnx-1B70/P2, GEnx-1B70C/P2, GEnx-1B74/75/P2, GEnx-1B76/P2, GEnx-1B76A/P2, and GEnx-2B67/P model turbofan engines with a certain a high-pressure turbine (HPT) rotor stage 2 disk installed. This proposed AD was prompted by a report of the potential for undetected subsurface anomalies formed during the manufacturing process that could result in uncontained failure of the HPT rotor stage 2 disk. This proposed AD would require an immersion ultrasonic inspection (USI) of the HPT rotor stage 2 disk and, depending on the results of the inspection, replacement of the HPT rotor stage 2 disk with a part eligible for installation. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 12, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-12650, comments due Jul 27, 2020 (https://www.federalregister.gov/documents/2020/06/12/2020-12650/airworthiness-directives-general-electric-company-turbofan-engines)

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