This document provides certification guidance on how to meet
the airworthiness requirements for the installation of
non-essential, non-required aircraft Cabin Systems and
Equipment (CS&E) and in doing so enable a standardized approach
across equipment manufacturers and installers.  The information
contained herein is applicable to installation methodologies of
aircraft CS&E approved under 14 CFR parts 23, 25, 27 and 29.
Both aerospace manufactured equipment and commercial off the
shelf (COTS) equipment is considered.