[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR229.46] [Page 390-391] TITLE 49--TRANSPORTATION CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 229_RAILROAD LOCOMOTIVE SAFETY STANDARDS--Table of Contents Subpart C_Safety Requirements Sec. 229.46 Brakes: General. The carrier shall know before each trip that the locomotive brakes and devices for regulating all pressures, including but not limited to the automatic and independent brake valves, [[Page 391]] operate as intended and that the water and oil have been drained from the air brake system.