Last week MARPA filed comments with the FAA in response to two policy documents that directly affect PMA manufacturers. As we previously explained on this blog, both of these documents speak directly to the PMA approval process.
Draft revision D to FAA Order 8110.42 Parts Manufacturer Approval Procedures. Two notable changes made in the revision was the removal of guidance to PMA applicants (released as a stand-alone document as draft AC 21.303-PMA) and the inclusion of a section directing ACOs to apply the FAA Risk Based Resource Targeting (RBRT) tool. It also made certain technical changes to the Order to update citations and keep up with rule changes.
MARPA observed that the inclusion of RBRT in the Order creates the risk of unequal treatment across—or even within—different offices. This is because the RBRT tool attempts to create the appearance of objectivity by assigning numerical values to what are essentially subjective evaluations by FAA personnel. Because the tool offers no metric, rubric, or guidance to aid FAA personnel in assigning values, it is possible for even identical projects to be assigned different risk values based on the subjective assessments of personnel. The ultimate result is that highly similar projects could be allocated markedly different resources.
Draft Advisory Circular 21.303-PMA updates the FAA guidance to applicants for PMA of articles submitted on the basis of test and computation or identicality without a license agreement. This guidance is for the most part a recast of the guidance that formerly appeared in Order 8110.42C. MARPA offered suggestions for improving the guidance related to sample sizes required for test and computation analysis, as well as general comments seeking to clarify the guidance.
In both documents, MARPA commented that the FAA should include a section describing use of the Streamlined PMA application process.
We plan to meet with representatives from the FAA in person to further discuss these comments. FAA personnel will also be at the MARPA Conference in Las Vegas, October 23-25, and available to discuss PMA guidance and other initiatives. MARPA will continue to work with the FAA to ensure that the guidance enhances safety while limiting burden to our members and the industry.