[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR33.47] [Page 774] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 33_AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents Subpart D_Block Tests; Reciprocating Aircraft Engines Sec. 33.47 Detonation test. Each engine must be tested to establish that the engine can function without detonation throughout its range of intended conditions of operation.