[Code of Federal Regulations] [Title 49, Volume 4] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR215.105] [Page 167] TITLE 49--TRANSPORTATION CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 215--RAILROAD FREIGHT CAR SAFETY STANDARDS--Table of Contents Subpart B--Freight Car Components Sec. 215.105 Defective axle. A railroad may not place or continue in service a car, if-- (a) An axle on the car has a crack or is broken; (b) An axle on the car has a gouge in the surface that is-- (1) Between the wheel seats; and (2) More than one-eighth inch in depth; (c) An axle on the car, used in conjunction with a plain bearing, has an end collar that is broken or cracked; (d) A journal on the car shows evidence of overheating, as evidenced by a pronounced blue black discoloration; or (e) The surface of the plain bearing journal on the axle, or the fillet on the axle, has-- (1) A ridge; (2) A depression; (3) A circumferential score; (4) Corrugation; (5) A scratch; (6) A continuous streak; (7) Pitting; (8) Rust; or (9) Etching.