The IPC-6012FS space addendum provides exceptions to IPC Performance Class 3 requirements of the IPC-6012F for use in space and military avionics product. Exceptions include changes to acceptance criteria and/or sample size and test frequency for production lot acceptance testing. The IPC-6012FS covers requirements for rigid printed boards to survive vibration, extreme thermal cycling and ground testing associated with space travel environment. Supersedes IPC-6012ES.