A wash pod is provided that includes unit dose of anhydrous wash concentrate surfactant containing at least one cationic surfactant and at least one nonionic surfactant in water soluble hygroscopic polymeric package containing the concentrate. This results in a high-quality aircraft part that has low cost and avoids the need for an autoclave. The mounting part has at least one first contact for electrical contact to at least one contact element of a contact part, and at least a second contact electrically connected to at least one first contact device for electrical contact with a conductor on the printed circuit board.