MARPA needs your help in developing comments on the FAA’s draft Materials Advisory Circular. This highly complex AC has the potential to broadly affect MARPA members and the PMA industry. Continue reading
Several draft FAA Advisory Circulars are currently open for comment of which MARPA members should take note.
Today the FAA’s Engine and Propeller Directorate released draft AC 33.15-3 Parts Manufacturer Approval (PMA) Metallic Part Material Compliance Using Comparative Test and Analysis Method for Turbine Engines or Auxiliary Power Units. This AC is intended to provide guidance to assist PMA applicants in developing tests to demonstrate the equivalence of materials with that of the type design materials. Continue reading
MARPA recently filed comments on the FAA Engine and Propeller Directorate’s draft Advisory Circular 33-Geometry, discussing geometry and dimensional considerations for comparative test and analysis for turbine engine and APU replacement parts. In a previous blog post we observed that AC identified a number dimensional and geometric factors that the FAA expects to be assessed in ensuring the integrity of … Continue reading
The FAA is currently seeking comments on its Draft Advisory Circular Engine Overtorque Test, Calibration Test, Endurance Test, and Teardown Inspection for Turbine Engine Certification (§§ 33.84, 33.85, 33.87, 33.93) and MARPA would like your comments! Continue reading
The FAA Engine and Propeller Directorate has issued a new draft Advisory Circular that could have a significant effect on companies seeking PMAs, STCs, or approval of repair or alteration of turbine engine and APU parts. Draft AC 33-Geometry: Geometry and Dimensional Considerations for Comparative Test and Analysis for Turbine Engine and Auxiliary Power Unit … Continue reading
In January, we wrote in this space about two new FAA Policy Statement proposals aimed at increasing coordination between FAA offices in the cases of certain engine PMA and propeller PMA applications. MARPA is always on the lookout for those potential regulations and policies–whether large or small–that could effect our members. In an effort to … Continue reading
The FAA has released a new draft Advisory Circular that is intended to describe acceptable statistical methods for developing substantiating data for comparative test and analysis compliance findings to support FAA approval of turbine engine and APU parts produced under a PMA, TC, STC, repair or alteration.
Several members have brought this AC to our attention and expressed their concerns about the details of this guidance. We welcome specific comments from members about problems and/or ways to improve this document. Based on member comments we have received so far, the proposed guidance appears likely to discourage applications to produce replacement parts. One reason for this is the large suggested sample size, and associated high costs, necessary to satisfy the proposed statistical analysis metrics. Continue reading
Good news! In response to the MARPA petition, the FAA plans to withdraw the vibration rule, in tomorrow’s Federal Register. Continue reading
The Modification and Replacement Parts Association (MARPA) is proud to announce that the FAA’s Mark Bouyer will present a special workshop on endurance, vibration and materials at the 2010 MARPA Conference. Bouyer manages PMA policy questions for the FAA’s Engine Directorate. His presentation will answer many of the questions that the industry has raised about how to show compliance with FAA airworthiness standards related to endurance, vibration and materials. Click through for more details. Continue reading
Heritage Global Partners is planning on auctioning off the tooling, manufacturing machines and inventory from Aerothrust. Continue reading
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