RP 627C - Brake Lining Structural Defects: Guidelines: Notes

This RP places defects into two categories: out-of-service and in-service. Structural defects listed as "in-service" will provide adequate brake performance but should be repaired as soon as possible. Defects listed as "out-of-service" constitute a fully defective brake and are conditions which:

1. if present on a steering axle brake, would place the vehicle out-of-service;
2. if found on 20 percent or more of the brakes, would place the vehicle out-of-service.