# Proposed AD FAA-2013-0561: Thielert Aircraft Engines GmbH Reciprocating Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-24-06
- Products: Thielert Aircraft Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 5, 2013, 78 FR 47228
- Comments due: October 4, 2013
- Became: [AD 2013-24-06](https://openairdocs.org/ad/2013-24-06)
- Docket: FAA-2013-0561 (https://www.regulations.gov/docket/FAA-2013-0561, where comments are filed)
- Project: 2013-NE-23-AD
- FR document: 2013-18797
- Official PDF: https://openairdocs.org/files/sha256/db/88/db8811e8b66ec4fb1de9a2cc75fba7078054d97059e3e2db18137602cd51abb5 (from https://www.govinfo.gov/content/pkg/FR-2013-08-05/pdf/2013-18797.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/08/05/2013-18797/airworthiness-directives-thielert-aircraft-engines-gmbh-reciprocating-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8D39EDA981247E6B86257BBE004957B0.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0561

## Summary

We propose to adopt a new airworthiness directive (AD) for all Thielert Aircraft Engines GmbH TAE 125-01 reciprocating engines. This proposed AD was prompted by a report of engine power loss due to engine coolant contaminating the engine clutch. The design of the engine allows the crankcase assembly opening to be susceptible to contamination from external sources. This proposed AD would require applying sealant to close the engine clutch housing (crankcase assembly) opening. We are proposing this AD to prevent in-flight engine power loss, which could result in loss of control of, and damage to, the airplane.

## Notices in this docket

- Aug 5, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-18797, comments due Oct 4, 2013 (https://www.federalregister.gov/documents/2013/08/05/2013-18797/airworthiness-directives-thielert-aircraft-engines-gmbh-reciprocating-engines)

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