# Airworthiness Directives; General Electric Company GE90 Series Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 1997-06-12 · Effective 1997-06-27 · 62 FR 32023
## Document
- **Document number:** 97-14955
- **Category:** airworthiness
- **Manufacturer:** General Electric Company GE90 Series Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 62 FR 32023
- **Publication date:** 1997-06-12
- **Effective date:** 1997-06-27
- **FAA docket:** Docket No. 97-ANE-22-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to General Electric Company (GE) GE90 series turbofan engines. This action requires initial and repetitive borescope inspections of compressor discharge pressure (CDP) manifolds for cracks, and replacement, if necessary, with an improved design CDP manifold. In addition, this AD requires, as terminating action to the inspections, replacement with an improved design CDP manifold. This amendment is prompted by reports of CDP manifold cracking that has resulted in liberated material causing high pressure compressor (HPC) blade damage. The actions specified in this AD are intended to prevent inflight engine power loss or shutdown due to HPC blade damage caused by liberated material from the CDP manifold.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/06/12/97-14955/airworthiness-directives-general-electric-company-ge90-series-turbofan-engines)
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