# Proposed AD FAA-2014-0940: Lycoming Engines Reciprocating Engines (Type Certificate Previously Held by Textron Lycoming Division, AVCO Corporation)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-10-06
- Products: Lycoming Engines
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 2, 2015, 80 FR 5489
- Comments due: April 3, 2015
- Became: [AD 2015-10-06](https://openairdocs.org/ad/2015-10-06)
- Docket: FAA-2014-0940 (https://www.regulations.gov/docket/FAA-2014-0940, where comments are filed)
- Project: 2014-NE-15-AD
- FR document: 2015-01835
- Official PDF: https://openairdocs.org/files/sha256/d3/18/d3184e6194ced4c86743d1168276143664d7e07e95d899e42983360fdb5c6ccd (from https://www.govinfo.gov/content/pkg/FR-2015-02-02/pdf/2015-01835.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/02/02/2015-01835/airworthiness-directives-lycoming-engines-reciprocating-engines-type-certificate-previously-held-by
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4021664E2665124386257DE0004FAB49.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0940

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Lycoming TIO-540-AJ1A reciprocating engines. This proposed AD was prompted by several reports of cracked engine exhaust pipes. This proposed AD would require inspection of the engine exhaust pipes for cracks and replacement of the turbocharger mounting bracket. We are proposing this AD to prevent failure of the exhaust system due to cracking, which could lead to uncontrolled engine fire, harmful exhaust gases entering the cabin resulting in crew incapacitation, and damage to the airplane.

## Notices in this docket

- Feb 2, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-01835, comments due Apr 3, 2015 (https://www.federalregister.gov/documents/2015/02/02/2015-01835/airworthiness-directives-lycoming-engines-reciprocating-engines-type-certificate-previously-held-by)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.