What indicates that the Air Flow Method test is complete?

The completion of the Air Flow Method test is indicated by the measurement that air flow does not exceed 60 CFM. This specific threshold is a critical safety parameter, ensuring that the air flow is within acceptable limits, which is essential for the proper functioning of the air brake system.

When the air flow is at or below 60 CFM, it confirms that there is no excessive leakage in the system and that it can maintain the necessary pressure levels for safe operation. This parameter is part of the criteria used to assess the integrity of the air brake system, and meeting this condition assures the crew that the system is functioning effectively and safely.