# Proposed AD FAA-2010-0820: Thielert Aircraft Engines GmbH Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 Reciprocating Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2011-07-09
- Products: Thielert Aircraft Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 17, 2012, 77 FR 57041
- Comments due: November 16, 2012
- Became: [AD 2011-07-09](https://openairdocs.org/ad/2011-07-09)
- Docket: FAA-2010-0820 (https://www.regulations.gov/docket/FAA-2010-0820, where comments are filed)
- Project: 2010-NE-31-AD
- FR document: 2012-22528
- Official PDF: https://openairdocs.org/files/sha256/15/15/151510ce0ea69688d207497a1075b498bafdb32973e0e59f42599f4251a3edfa (from https://www.govinfo.gov/content/pkg/FR-2012-09-17/pdf/2012-22528.pdf)
- Federal Register: https://www.federalregister.gov/documents/2012/09/17/2012-22528/airworthiness-directives-thielert-aircraft-engines-gmbh-models-tae-125-01-tae-125-02-99-and-tae
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2EC4BDD97EFFF92986257A7C0060138A.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0820

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to all Thielert Aircraft Engines (TAE) GmbH Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 Reciprocating Engines. The existing AD currently requires installation of full-authority digital electronic control (FADEC) software version 2.91. Since we issued that AD, we have received reports of possible power loss on airplanes equipped with TAE 125 engines. This proposed AD would require removing all software mapping versions prior to 292, 301, or 302, applicable to the TAE engine model. We are proposing this AD to prevent engine power loss or in-flight shutdown, resulting in reduced control of or damage to the airplane.

## Notices in this docket

- Nov 23, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-29449, comments due Jan 7, 2011 (https://www.federalregister.gov/documents/2010/11/23/2010-29449/airworthiness-directives-thielert-aircraft-engines-gmbh-models-tae-125-01-tae-125-02-99-and-tae)
- Sep 17, 2012: Notice of proposed rulemaking (NPRM)., FR document 2012-22528, comments due Nov 16, 2012 (https://www.federalregister.gov/documents/2012/09/17/2012-22528/airworthiness-directives-thielert-aircraft-engines-gmbh-models-tae-125-01-tae-125-02-99-and-tae)

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