Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R5139306 found under Blower Assembly by Mtu America Incorporated. The National Stock Number assigned to this part is 2990000010001, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R5139306.