Damaged Ship was placed in the shipyard it originally came from. Repair Docked from Design selected. Ship was deconstructed. After a few seconds, I checked the shipyard computer. Nothing was there. Attempting to load the design it was being repaired from brought the error:
Cannot Load Design
Entity for design not valid in database
No changes has been made to the ship other than damage from combat (to the turrets). Unknown if that would affect it.