# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2020-12-16 · Effective 2021-01-21 · 85 FR 81378
## Document
- **Document number:** 2020-27628
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 81378
- **Publication date:** 2020-12-16
- **Effective date:** 2021-01-21
- **FAA docket:** Docket No. FAA-2020-0592
## Abstract

The FAA is adopting 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 high- pressure turbine (HPT) rotor stage 2 disk installed. This 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 AD requires 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 issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/16/2020-27628/airworthiness-directives-general-electric-company-turbofan-engines)
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