# Airworthiness Directives; Honeywell International Inc. ATF3-6 and ATF3-6A Series Turbofan Engines
> **Rule** · Final rule. · Published 2008-03-18 · Effective 2008-04-22 · 73 FR 14377
## Document
- **Document number:** E8-5274
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. ATF3-6 and ATF3-6A Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 73 FR 14377
- **Publication date:** 2008-03-18
- **Effective date:** 2008-04-22
- **FAA docket:** Docket No. FAA-2007-29092
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. ATF3-6 and ATF3-6A series turbofan engines equipped with a certain part number (P/N) low pressure compressor (LPC) aft shaft. This AD requires removing from service those LPC aft shafts and installing a serviceable LPC aft shaft. This AD results from reports of eight LPC aft shafts found cracked during fluorescent penetrant inspection (FPI). We are issuing this AD to prevent uncoupling and overspeed of the low pressure turbine, which could result in uncontained engine failure and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2008/03/18/E8-5274/airworthiness-directives-honeywell-international-inc-atf3-6-and-atf3-6a-series-turbofan-engines)
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