Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 39278 40263 10 found under Control Box Electrical Electroni by Aai Corporation. The National Stock Number assigned to this part is 1660016601603, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 39278 40263 10.