# Airworthiness Directives; General Electric Company Turbofan Engines
> **Rule** · Final rule. · Published 2016-09-30 · Effective 2016-11-04 · 81 FR 67098
## Document
- **Document number:** 2016-23740
- **Category:** airworthiness
- **Manufacturer:** General Electric Company Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 81 FR 67098
- **Publication date:** 2016-09-30
- **Effective date:** 2016-11-04
- **FAA docket:** Docket No. FAA-2016-5307
## Abstract

We are adopting a new airworthiness directive (AD) for all General Electric Company (GE) GE90-76B, GE90-77B, GE90-85B, GE90-90B, and GE90-94B turbofan engines with high-pressure compressor (HPC) stage 8-10 spool, part numbers (P/Ns) 1694M80G04, 1844M90G01, or 1844M90G02, installed. This AD was prompted by reports of cracks found on the seal teeth of the HPC stage 8-10 spool. This AD requires eddy current inspections (ECIs) or fluorescent penetrant inspections (FPIs) of the HPC stage 8-10 spool seal teeth and removing from service those parts that fail inspection. We are issuing this AD to prevent failure of the HPC stage 8-10 spool, uncontained rotor release, damage to the engine, and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/09/30/2016-23740/airworthiness-directives-general-electric-company-turbofan-engines)
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