Old A330s have a basic AH, but newer aircraft have an Integrated Standby Instrument System (ISIS). It's basically a souped-up AH plus ASI/altimeter and ILS scales combined into one instrument and displayed on a small screen. The ISIS has its own gyros and air data module, so it's independent of the other aircraft systems.
Last edited by BuzzBox; 9th Sep 2016 at 12:01.