Defective plain bearing.

A railroad may not place or continue in service a car, if the car has a plain bearing— (a) That is missing, cracked, or broken; (b) On which the bearing liner— (1) Is loose; or (2) Has a broken out piece; or (c) That shows signs of having been overheated, as evidenced by— (1) Melted babbitt; (2) Smoke from hot oil; or (3) Journal surface damage.