What is the procedure for performing a Class 1A FRA air brake test?

The procedure for performing a Class 1A FRA air brake test involves having the conductor walk around while the brakes are released and applied. This practice is crucial because it allows for a direct assessment of the brake system's functionality and ensures that all components are operating correctly. The conductor's walkaround serves as a verification step, where they can visually inspect the brakes on each car to confirm that they are releasing properly and that there are no air leaks or defects present.

While it may seem feasible to consider the brakes being released with the train stationary, this would not provide the thorough inspection opportunity needed to validate proper brake operation, since visual checks are an essential part of the safety procedure. The involvement of the engineer alone, as suggested in another option, would not suffice without the physical confirmation from the conductor. Lastly, conducting the test while the train is moving would pose safety risks and does not adhere to standard testing protocols for air brakes. Thus, the approach of having the conductor perform a walkaround during the brake application and release stages is the fundamentally sound procedure in ensuring compliance with safety standards.