# Airworthiness Directives; Honeywell International Inc. TFE731 Series Turbofan Engines
> **Rule** · Final rule. · Published 2010-03-17 · Effective 2010-04-21 · 75 FR 12663
## Document
- **Document number:** 2010-5507
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. TFE731 Series Turbofan
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 75 FR 12663
- **Publication date:** 2010-03-17
- **Effective date:** 2010-04-21
- **FAA docket:** Docket No. FAA-2009-0331
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. TFE731 series turbofan engines with certain second stage low-pressure compressor rotor (LPCR) discs and/or certain third stage LPCR discs installed. This AD requires removing from service certain second stage LPCR discs and/or certain third stage LPCR discs. This AD results from a report of cracks found during a fluorescent penetrant inspection (FPI) of the disc bore. We are issuing this AD to prevent an uncontained failure of a second stage LPCR disc and/or a third stage LPCR disc due to cracks in the bore, which could result in damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2010/03/17/2010-5507/airworthiness-directives-honeywell-international-inc-tfe731-series-turbofan-engines)
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