# Airworthiness Directives; Honeywell International Inc. TPE331-10 and TPE331-11 Series Turboprop Engines
> **Rule** · Final rule; request for comments. · Published 2009-08-17 · Effective 2009-09-01 · 74 FR 41327
## Document
- **Document number:** E9-19633
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. TPE331-10 and TPE331-11 Series Turboprop
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 74 FR 41327
- **Publication date:** 2009-08-17
- **Effective date:** 2009-09-01
- **FAA docket:** Docket No. FAA-2009-0555
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. TPE331-10 and TPE331-11 series turboprop engines. This AD requires removing certain first stage turbine disks from service. This AD results from a report of an uncontained failure of a first stage turbine disk that had a metallurgical defect. We are issuing this AD to prevent uncontained failure of the first stage turbine disk and damage to the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/08/17/E9-19633/airworthiness-directives-honeywell-international-inc-tpe331-10-and-tpe331-11-series-turboprop)
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