Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 19E143-1A found under Tail Rotor Drive Co by Honeywell Aerospace. The National Stock Number assigned to this part is 1615010829328, and the Federal Supply Class is 1615 Helicopter Rotor Blades Drive Mechanisms And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 19E143-1A.