COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 747 Series Aeroplanes AD/B747/91 EFIS Control Panel 6/91 Applicability: All model 747-400 series with line numbers 1 through 791. Requirement: Action in accordance with the technical requirements of FAA AD 91-06-17. Note: Collins Service Bulletin No DCP-7000-31-04 also refers. Compliance: As specified in the Requirement Document. Background: Country of Origin AD to prevent failure of either pilots EFIS control panel, with resultant smoke in the flight deck.