# Airworthiness Directives; Honeywell International Inc. Turbofan Engines
> **Rule** · Final rule; request for comments. · Published 2011-11-29 · Effective 2011-12-14 · 76 FR 73489
## Document
- **Document number:** 2011-30575
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. Turbofan
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 76 FR 73489
- **Publication date:** 2011-11-29
- **Effective date:** 2011-12-14
- **FAA docket:** Docket No. FAA-2011-1261
## Abstract

We are adopting a new airworthiness directive (AD) for certain Honeywell International Inc. ALF502L-2C, ALF502R-3, ALF502R-3A, ALF502R-5, LF507-1F, and LF507-IH turbofan engines. This AD requires removing from service certain second stage high pressure compressor (HPC2) discs. This AD was prompted by a report of cracks found in an HPC2 disc during routine inspection. We are issuing this AD to prevent the affected discs from fracturing before reaching the currently published life limit. A disc fracture could result in an uncontained failure of the disc and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/11/29/2011-30575/airworthiness-directives-honeywell-international-inc-turbofan-engines)
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