{"data":{"id":"us/14-cfr-33.63","jurisdiction":"us","citation":"14 CFR 33.63","heading":"Vibration.","body":"Each engine must be designed and constructed to function throughout its declared flight envelope and operating range of rotational speeds and power/thrust, without inducing excessive stress in any engine part because of vibration and without imparting excessive vibration forces to the aircraft structure.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 33—AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES","Subpart E—Design and Construction; Turbine Aircraft Engines"],"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":"c4f9f601ada26a73e25e3e0cab48e23766dab62c2323d97698bebbec2f36c3cb","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-33.62","next":"us/14-cfr-33.64"},"notice":"GroundRules: Original legal text. Not legal advice."}