# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2021-09-17 · Effective 2021-10-22 · 86 FR 51792
## Document
- **Document number:** 2021-20042
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 51792
- **Publication date:** 2021-09-17
- **Effective date:** 2021-10-22
- **FAA docket:** Docket No. FAA-2019-0919
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) CF34-8 model turbofan engines with a certain outer shell combustion liner (combustion outer liner shell) installed. This AD was prompted by two in-flight engine shutdowns (IFSDs) that occurred as a result of failures of the combustion outer liner shell. This AD requires a borescope inspection (BSI) or visual inspection of the combustion outer liner shell and, depending on the results of the inspection, possible replacement of the combustion outer liner shell. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/17/2021-20042/airworthiness-directives-general-electric-company-turbofan-engines)
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