{"data":{"id":"us/14-cfr-33.21","jurisdiction":"us","citation":"14 CFR 33.21","heading":"Engine cooling.","body":"Engine design and construction must provide the necessary cooling under conditions in which the airplane is expected to operate.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 33—AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES","Subpart B—Design and Construction; General"],"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":"ed440651eaaad4f5735f2377c38d4b98d2e802148f88f1ec972f47ad9efc9346","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-33.19","next":"us/14-cfr-33.23"},"notice":"GroundRules: Original legal text. Not legal advice."}