What type of inspection is the BRU-61 carriage system limited to?

The BRU-61 carriage system is primarily subjected to a visual inspection. This type of inspection focuses on examining the external condition of the equipment, looking for any signs of damage, wear, or issues that might not require more invasive testing methods. Visual inspections are essential in ensuring that the equipment is free from obvious defects and is safe to operate.

In the context of the BRU-61 system, it's designed to be evaluated through straightforward visual checks, making it easier and quicker for maintenance personnel to identify any immediate concerns that might need further attention. While functional, operational, and preventive maintenance inspections are critical in their respective contexts, they involve more detailed evaluations that aren't the focus for the BRU-61 carriage system specifically. This reinforces the importance of the visual inspection as a fundamental practice for maintaining the operational readiness of this type of equipment.