COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Avro Anson and Avro 19 Series Aeroplanes AD/ANSON/8 Fuel Crossfeed Cock Placard - Installation 3/52 Applicability: Anson. Requirement: Install a placard adjacent to the fuel crossfeed cock, indicating clearly the "ON" and "OFF" positions of the cock when viewed from the pilot's seat; or ANO 105.1.31.4.5.9. Compliance: Forthwith.