COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 35 (Bonanza) Series Aeroplanes AD/BEECH 35/65 Cabin Fresh Air Blower 12/91 Applicability: Model V35B with serial numbers D-10348, and D-10364 through D-10403. Requirement: Action IAW the Technical Requirements of FAA AD 91-20-08 Amdt 39-8042. Note: Beech SB 2380 refers. Compliance: As specified in the requirement documents with a revised effective date of 12 December 1991 for Australian registered aircraft. Background: Reports have been received of air blower housing attachment failures. This condition could lead to blower impingement on the flight control cables located below the blower. The effective date required by the FAA is extended by approximately one month.