COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Christen Industries A-1 (Husky) Series Aeroplanes AD/HUSKY/2 Carburettor Air Intake Box 1/92 Applicability: Model A-1 with serial number 1001 through 1045. Requirement: Action in accordance with the technical requirements of FAA AD 91-23-02 Amdt 39-8071. Compliance: As specified in the requirement document. Background: Reports of valve engine failures on the air intake box has occurred. This failure could result in loss of engine power.