COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SAAB SF340 Series Aeroplanes AD/SF340/19 Ice Protection 2/91 Applicability: Model SF340A series with S/No's 340A-004 through 340A-048. Requirement: 1. For S/No's 340A-004 through 340A-048: Action in accordance with the technical requirements of LFV (Swedish) AD 1-004 revision C Part (A). 2. For S/No's 340A-004 through 340A-028: Action in accordance with the technical requirements of LFV AD 1-004 revision C Part (B) and (C). Note: SAAB SB's SF340-30-008, SF340-54-002 and SF340-76-006 refer. Compliance: Unless already accomplished; before 30 April 1991. Background: This AD is raised in response to revision C of LFV AD 1-004, which reflects Revision 3 of SB SF340-30-008. The SB transfers the service check interval to Maintenance Review Board Report TASK 30-20-00(5).