49 C.F.R. § 215.117 Defective roller bearing adapter.
Title 49 - Transportation
A railroad may not place or continue in service a car, if the car has a roller bearing adapter that is— (a) Cracked or broken; (b) Not in its design position; or (c) Worn on the crown of the adapter to the extent that the frame bears on the relief portion of the adapter, as shown in the figure below (see figure 1).
Title 49: Transportation
PART 215—RAILROAD FREIGHT CAR SAFETY STANDARDS
Subpart B—Freight Car Components
Suspension System
§ 215.117 Defective roller bearing adapter.