Today the FAA’s Engine and Propeller Directorate published announcements in the Federal Register regarding two new advisory circulars. The first, Advisory Circular (AC) 33.70-1, Guidance Material for Aircraft Engine Life-limited Parts Requirements, was actually issued on July 31, 2009. AC 33.70-1 provides definitions, guidance, and acceptable methods that may be used to demonstrate compliance with the engine life-limited parts integrity requirements of FAR 33.70 (requirements applicable to the design and life management of propulsion system life-limited parts including high-energy rotating parts).
If you have questions regarding AC 33.70-1 or would like further information regarding the AC, you may contact Timoleon Mouzakis, Engine and Propeller Standards Staff, ANE-111, 12 New England Executive Park, Burlington, MA 01803-5299; telephone: (781) 238-7114; fax: (781) 238-7199; e-mail: email@example.com.
The second, Advisory Circular (AC) 33-8, Guidance for Parts Manufacturer Approval of Turbine Engine and Auxiliary Power Unit Parts under Test and Computation, was actually issued on August 19, 2009. AC 33-8 provides guidance for developing substantiation data to support the design approval of critical and complex turbine engine and auxiliary power unit (APU) parts produced under parts manufacturer approval. The AC’s guidance is for the comparative test and analysis method used to show compliance to the airworthiness requirements under test and computation, per FAR 21.303 and supports showing the engine or APU still complies with FAR Part 33 and Technical Standard Order C77b.
If you have questions regarding AC 33-8 or would like further information regarding the AC, you may contact Karen M. Grant, Engine and Propeller Standards Staff, ANE-111, 12 New England Executive Park, Burlington, MA 01803-5299; telephone: (781) 238-7119; fax: (781) 238-7199; e-mail: firstname.lastname@example.org.