Inbound Transportation - Updating the PO promised delivery date

We're using Inbound Transportation for Purchase Orders and using Shipments and Loads. When purchase orders are created, the user manually enters the Promised Delivery Date, and shipments are automatically assigned to each PO line. We have Shipment Consolidation turned off so that each PO line gets a unique shipment number. Users then create a Load and manually add the shipments they want on the load.

Is there a way to update a date on the load (e.g. in Stop Sequence), and this automatically updates all the associated PO lines in F4311?