The FAA has issued for comment a draft Advisory Circular focused on sample size for statistical analysis in PMA applications. As many of you remember, there was a draft on statistical analysis issued several years ago. MARPA objected to that draft because it implied that every PMA application needed to be based on statistical analysis, … Continue reading
Back in December, the FAA published the System Safety Assessments NPRM. Along with that publication was issued a raft of draft advisory circulars related to specific provisions of Part 25 (Airworthiness Standards for Transport Category Airplanes). Those draft ACs are: Comments on each of these draft ACs is due April 24, 2023. The MARPA Technical … Continue reading
The FAA has released two guidance documents for comment pertaining to the development and distribution of ICA. Continue reading
On Monday the FAA released new guidance that provides a method of compliance for the test requirements of 14 CFR § 33.84 (engine overtorque test) when the applicant chooses to run that test as part of the endurance test of § 33.87, as well as information and guidance on the test requirements of § 33.85 (calibration test), § 33.87 (endurance test), and § 33.93 (teardown inspection). Continue reading
The FAA has released two new advisory circulars that may affect the PMA community: Casting Factors and Proof of Structure 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
The FAA has published a draft advisory circular on Commercial Parts. This Commercial Parts issue could pose a business opportunity for some companies, while erecting an impediment to operation for others. Click through for the full story! Continue reading
The FAA has published a draft advisory circular for comment on Quality Control for the Manufacture of Non-Metallic Compartment Interior Components. Comments are due August 30, 2010. Click through for complete details. Continue reading
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