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Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
33.15-1A Manufacturing Process of Premium Quality Titanium Alloy Rotating Engine Components Active AIR-625 2025-09-08
33.15-2 Manufacturing Processes for Premium Quality Nickel Alloy for Engine Rotating Parts

This advisory circular (AC) provides information and guidance on compliance with the nickel materials suitability and durability requirements in part 33 of Title 14 of the Code of Federal Regulations (14 CFR part 33).

Active ANE-111 2011-02-04
33.15-3 Powder Bed Fusion Additive Manufacturing Process for Aircraft Engine Parts

This advisory circular (AC) describes an acceptable means for demonstrating compliance with Title 14, Code of Federal Regulations (14 CFR) 33.15 for aircraft engine parts with materials produced by the powder bed fusion (PBF) additive manufacturing (AM) process.

Active AIR-621 2023-06-23