Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MBB-BK117 D-2 found under Helicopterutility by Airbus Helicopters Inc. The National Stock Number assigned to this part is 1520016853722, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MBB-BK117 D-2.