Part Number AD20.42.55F.05.1.AU Altimeter Standby in stock with ready to ship. Get an instant quote for Bombardier Aerospace part number AD20.42.55F.05.1.AU by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for AD20.42.55F.05.1.AU. Our dedicated account manager will get back to you within 15 minutes.