# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2018-10-26 · Effective 2018-11-30 · 83 FR 53976
## Document
- **Document number:** 2018-23466
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 53976
- **Publication date:** 2018-10-26
- **Effective date:** 2018-11-30
- **FAA docket:** Docket No. FAA-2018-0406
## Abstract

We are superseding Airworthiness Directive (AD) 2017-07-04 for General Electric Company (GE) GE90-110B1 and GE90-115B turbofan engines with certain high-pressure compressor (HPC) rotor stage 2-5 spools installed. AD 2017-07-04 required removing certain HPC rotor stage 2-5 spools from service at times determined by a drawdown plan. This AD requires removing certain HPC rotor stage 2-5 spools from service before reaching the new reduced life limit and replacing them with parts eligible for installation. This AD was prompted by the publication of a GE service bulletin (SB) that increases the number of affected HPC rotor stage 2-5 spools and includes HPC rotor stage 2-5 spools that were inadvertently omitted from the applicability of AD 2017-07-04. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/10/26/2018-23466/airworthiness-directives-general-electric-company-turbofan-engines)
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