# Proposed AD 99-NE-53-AD: Honeywell International Inc. TPE331 Series Turboprop and TSE331-3U Series Turboshaft Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-21-15
- Products: Honeywell International
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 19, 2002, 67 FR 7318
- Comments due: April 22, 2002
- Became: [AD 2002-21-15](https://openairdocs.org/ad/2002-21-15)
- Docket: 99-NE-53-AD
- FR document: 02-3877
- Official PDF: https://openairdocs.org/files/sha256/bd/02/bd02fdb13a2f8f013d3088c122bab2f3499680f777f84301199004e9dd700414 (from https://www.govinfo.gov/content/pkg/FR-2002-02-19/pdf/02-3877.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/02/19/02-3877/airworthiness-directives-honeywell-international-inc-tpe331-series-turboprop-and-tse331-3u-series
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA2458E972D3072B86256B65004FAE73.0001
- Page: https://openairdocs.org/proposed/99-NE-53-AD

## Summary

The Federal Aviation Administration (FAA) proposes to adopt a new airworthiness directive (AD) that is applicable to Honeywell International Inc. (formerly AlliedSignal Inc., Garrett Engine Division, Garrett Turbine Engine Company, and AiResearch Manufacturing Company of Arizona) TPE331 series turboprop and model TSE331-3U series turboshaft engines. This proposal would require replacing second stage turbine stator assemblies, part numbers (P/N's) 894528-1, -2, -3, -5, -6, -10, and -11, with serviceable turbine stator assemblies. This proposal is prompted by reports of six uncontained separations of the second stage turbine wheels. The actions specified by the proposed AD are intended to reduce fatigue damage of the second stage turbine stator inner seal support, rotating knife seal, and the second and third stage turbine wheels which may result in an uncontained rotor failure and damage to the aircraft.

## Notices in this docket

- Feb 19, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 02-3877, comments due Apr 22, 2002 (https://www.federalregister.gov/documents/2002/02/19/02-3877/airworthiness-directives-honeywell-international-inc-tpe331-series-turboprop-and-tse331-3u-series)

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