# Proposed AD FAA-2007-0051: Continental Motors, Inc. Reciprocating Engines With Superior Air Parts, Inc. (SAP) Cylinder Assemblies Installed

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-16-03
- Products: Continental Motors
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 13, 2013, 78 FR 56622
- Comments due: November 12, 2013
- Became: [AD 2009-16-03](https://openairdocs.org/ad/2009-16-03)
- Docket: FAA-2007-0051 (https://www.regulations.gov/docket/FAA-2007-0051, where comments are filed)
- Project: 2007-NE-37-AD
- FR document: 2013-22273
- Official PDF: https://openairdocs.org/files/sha256/31/20/3120205f51bfd0e48f0e7815de5a10b7def1c819688b5ac2103d3dec3f08d7d9 (from https://www.govinfo.gov/content/pkg/FR-2013-09-13/pdf/2013-22273.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/09/13/2013-22273/airworthiness-directives-continental-motors-inc-reciprocating-engines-with-superior-air-parts-inc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6BBBA52CA705CF4F86257BE500494255.0001
- Page: https://openairdocs.org/proposed/FAA-2007-0051

## Summary

We propose to supersede an existing airworthiness directive (AD) that applies to certain Continental Motors, Inc. (CMI) IO-520, TSIO-520, and IO-550 series reciprocating engines, with certain replacement parts manufacturer approval (PMA) SAP investment cast cylinder assemblies installed. The existing AD currently requires initial and repetitive inspections and compression tests to detect cracks in those cylinders. Since we issued that AD, we became aware of additional engines that need to be added to the applicability. We are proposing this AD to prevent the separation of the cylinder head, damage to the engine, and damage to the airplane.

## Notices in this docket

- Apr 11, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-7711, comments due Jun 10, 2008 (https://www.federalregister.gov/documents/2008/04/11/E8-7711/airworthiness-directives-teledyne-continental-motors-tcm-io-520-tsio-520-and-io-550-series-engines)
- Sep 13, 2013: Notice of proposed rulemaking (NPRM)., FR document 2013-22273, comments due Nov 12, 2013 (https://www.federalregister.gov/documents/2013/09/13/2013-22273/airworthiness-directives-continental-motors-inc-reciprocating-engines-with-superior-air-parts-inc)

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