Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 89Z478D4 found under Transmitter Engine Temperature by Ppm Cranes Inc. The National Stock Number assigned to this part is 6620010852915, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 89Z478D4.