This document provides guidance for the development and installation of a Cockpit Voice Recorders (CVR) with solid-state memory. Supplement 6 provides the following: " The optional interfaces to data link services and On-Board Maintenance System (OMS) were revised to clarify that if the optional interface is implemented, then it shall be implemented in a specific way. " The power input section was revised to clarity the need for the CVR to be designed to accept 115 Vac power and 28 Vdc power from the aircraft. " The time correlation requirement was revised to specify that the CVR should receive its time signal from the same source as the Flight Data Recorder (FDR). " The OMS interface was updated to describe the correct ARINC 429 Sign Status Matrix (SSM) encoding for new CVR designs.