# Proposed AD FAA-2015-4866: Honeywell International Inc. Turboprop and Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-18-17
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 15, 2016, 81 FR 13764
- Comments due: May 16, 2016
- Became: [AD 2016-18-17](https://openairdocs.org/ad/2016-18-17)
- Docket: FAA-2015-4866 (https://www.regulations.gov/docket/FAA-2015-4866, where comments are filed)
- Project: 2015-NE-33-AD
- FR document: 2016-05704
- Official PDF: https://openairdocs.org/files/sha256/34/a6/34a6cbcec1359924901c74c6a4440095b8115339b69b6d7e4f1b9ef82d22eddf (from https://www.govinfo.gov/content/pkg/FR-2016-03-15/pdf/2016-05704.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/03/15/2016-05704/airworthiness-directives-honeywell-international-inc-turboprop-and-turboshaft-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41A82899E1F46E7A86257F77005B7D52.0001
- Page: https://openairdocs.org/proposed/FAA-2015-4866

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Honeywell International Inc. (Honeywell) TPE331 model turboprop engines and TSE331-3U model turboshaft engines. This proposed AD was prompted by the discovery of cracks in a 2nd stage compressor impeller during a routine shop visit. This proposed AD would require removal of the 2nd stage compressor impeller. We are proposing this AD to prevent failure of the compressor impeller, uncontained part release, damage to the engine, and damage to the airplane.

## Notices in this docket

- Mar 15, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-05704, comments due May 16, 2016 (https://www.federalregister.gov/documents/2016/03/15/2016-05704/airworthiness-directives-honeywell-international-inc-turboprop-and-turboshaft-engines)

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