# Airworthiness Directives; Honeywell International Inc. TPE331-10 and TPE331-11 Series Turboprop Engines
> **Rule** · Final rule. · Published 2012-02-09 · Effective 2012-03-15 · 77 FR 6669
## Document
- **Document number:** 2012-2894
- **Category:** airworthiness
- **Manufacturer:** Honeywell International Inc. TPE331-10 and TPE331-11 Series Turboprop
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 77 FR 6669
- **Publication date:** 2012-02-09
- **Effective date:** 2012-03-15
- **FAA docket:** Docket No. FAA-2011-0789
## Abstract

We are adopting a new airworthiness directive (AD) for the products listed above. This AD was prompted by a report of an uncontained failure of a first stage turbine disk that had a metallurgical defect. This AD requires inspecting certain serial number (S/N) first stage turbine disks, part number (P/N) 3101520-1 and P/N 3107079-1. 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/2012/02/09/2012-2894/airworthiness-directives-honeywell-international-inc-tpe331-10-and-tpe331-11-series-turboprop)
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