Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S161 1391 90 found under Control Panel Aircr by L3 Communications Corp. The National Stock Number assigned to this part is 1680015943818, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S161 1391 90.