{"data":{"id":"us/14-cfr-25.603","jurisdiction":"us","citation":"14 CFR 25.603","heading":"Materials.","body":"The suitability and durability of materials used for parts, the failure of which could adversely affect safety, must—\n(a) Be established on the basis of experience or tests;\n(b) Conform to approved specifications (such as industry or military specifications, or Technical Standard Orders) that ensure their having the strength and other properties assumed in the design data; and\n(c) Take into account the effects of environmental conditions, such as temperature and humidity, expected in service.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 25—AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES","Subpart D—Design and Construction"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"fdb51b9b52674d6f793a554ac77f49a92244c1a05a82cbf3db3e6845a949d2e9","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-25.601","next":"us/14-cfr-25.605"},"notice":"GroundRules: Original legal text. Not legal advice."}