Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A91 489 4 found under Panel Electronic Circuit by Thales Training And Simulation Ltd. The National Stock Number assigned to this part is 5999997381299, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A91 489 4.