Hi Michael - Sorry for my confusion but why would someone be worried about the shelf life of an "assembled" board? I assume you mean completely soldered and cleaned/noclean assembly ready for use. Unless you have a battery on the assembly or some issue with a specific component I believe that the shelf life is nearly infinite (or until technology makes it obsolete). Can you expand on some of the details of how the question of shelf life for a completed assembly originated? Dave Hillman Rockwell Collins [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: FAB / ASSY Author: [log in to unmask] at ccmgw1 Date: 6/12/96 9:56 PM Are there any guidelines or specifications for the shelf life of an assembled board. I would like to here the opinions of those who have addressed this issue in the past, in reference to unused boards to service boards. Thank You Michael Cussen [log in to unmask]