A major engine manufacturer wanted to improve maintenance and assistance services, leveraging mixed reality applications, 5G technologies and the AWS cloud. Reply built a solution to support hands-free training for maintenance activities, by showing a holographic preview of the operations to be performed. QuickSight was used to show management some statistics about maintenance activities (e.g. maintenance information for specific engines, average time to perform maintenance operations). The solution allowed a quicker identification of errors and an overall reduction of errors during maintenance procedures.