What must be recorded in a maintenance log regarding parts replacement?

Recording the phone number of the repair technician in a maintenance log is useful for several reasons, particularly in fostering accountability and ensuring clear communication. If issues arise with the replaced parts or if further maintenance is required, having the technician's contact information readily available allows for quick follow-up. This can be crucial in situations where immediate assistance or clarification about the repair is necessary.

Other aspects, while important, have different implications. For example, knowing the name of the parts supplier can help in tracking quality and sourcing for future needs, but it does not directly pertain to the specifics of the maintenance process. The warranty conditions are crucial for understanding liability and potential future costs, but they do not impact the maintenance log's utility in tracking repairs. Lastly, while tracking the estimated lifespan of replaced parts can aid in future planning and scheduling for maintenance, it is typically not considered essential information for the immediate record-keeping in a maintenance log focused on recent repairs.