Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 142 9239 PARTS KIT A found under Parts Kit Table Operating Field by F W Lang Co. The National Stock Number assigned to this part is 6545013270621, 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 142 9239 PARTS KIT A.