Flight Recording in the UK: 2. Equipment

A system which has been in service with Trident and other types of aircraft for some years is the Plessey PV 726A which was one of the first to incorporate expanded facilities to acquire AIDS information. It consists essentially of a data entry panel which permits the insertion of flight identification data, self‐test facilities, ON/OFF switching and fault indication, an acquisition unit, transducers, DFDR or accident recorder, and the quick access recorder.