Presolicitation DEPT OF DEFENSE DEPT OF THE NAVY is seeking a UNIT,BUS ADAPTER, IN REPAIR/MODIFICATION OF. This item is typically used for electrical and electronic properties measuring and testing instruments. The procurement requires 7 EA to be delivered FOB ORIGIN. Government source approval is required due to the item being flight critical and/or inadequate technical data. Only previously approved sources have been solicited. Interested parties must submit the necessary information for source approval. The proposed contract action is for supplies or services for which the Government intends to negotiate with only one source. All responsible sources may express their interest and capability to respond to the requirement.