Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66910550-9 found under Receiver Transmitter Subassembly by Elbit Systems Ltd. The National Stock Number assigned to this part is 1270013748638, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 66910550-9.