[Code of Federal Regulations] [Title 14, Volume 1] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 14CFR34.81] [Page 774] TITLE 14--AERONAUTICS AND SPACE CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 34--FUEL VENTING AND EXHAUST EMISSION REQUIREMENTS FOR TURBINE ENGINE POWERED AIRPLANES--Table of Contents Subpart H--Test Procedures for Engine Smoke Emissions (Aircraft Gas Turbine Engines) Sec. 34.81 Fuel specifications. Fuel having specifications as provided in Sec. 34.61 shall be used in smoke emission testing.