Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 957289-249 found under Radome Boom Assembly by Bombardier Aerospace. The National Stock Number assigned to this part is 1560011274254, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 957289-249.