The ERRC designated code that identifies an item due in from maintenance (DIFM) is?

The designated code that identifies an item due in from maintenance (DIFM) is XD. This code is used within the supply chain management system to specifically indicate that an asset or part is pending return from maintenance activities. When an item has been sent out for maintenance and is expected to be returned, logging it under the XD code helps streamline the inventory tracking and ensures that personnel are aware of items that are temporarily out of service but are scheduled to come back.

The use of the XD code in military supply systems enhances the efficiency of tracking maintenance items, facilitating better planning and inventory management. This ensures that aircrew have timely access to the necessary equipment for flight operations once repairs or maintenance have been completed.