# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2013-09-13 · Effective 2013-10-18 · 78 FR 56594
## Document
- **Document number:** 2013-22243
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 56594
- **Publication date:** 2013-09-13
- **Effective date:** 2013-10-18
- **FAA docket:** Docket No. FAA-2013-0186
## Abstract

We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GE90-76B, -85B, -90B, -94B, -110B1, and - 115B turbofan engines. This AD was prompted by multiple reports of distress of certain stage 1 high-pressure turbine (HPT) stator shrouds due to accelerated corrosion and oxidation, including one engine in- flight shutdown (IFSD) caused by failure of the HPT stator shrouds. This AD requires initial and repetitive on-wing 360-degree borescope inspections (BSIs) for corrosion and oxidation of stage 1 HPT stator shrouds. If a shroud is found to be distressed, this AD requires reinspection at a reduced interval or removal from service before further flight. We are issuing this AD to prevent failure of stage 1 HPT stator shrouds, resulting in an IFSD of one or more engines, loss of thrust control, and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/09/13/2013-22243/airworthiness-directives-general-electric-company-turbofan-engines)
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