COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 400 Series Aeroplanes AD/CESSNA 400/43 Amdt 8 Engine Exhaust System 13/97 Applicabilility: All model 401, 401A, 401B,402,402A,402B,414,414A,421,421A and 421B series aeroplanes. Requirement: 1. Inspect applicable aircraft engine exhaust system assemblies in accordance with the provisions of Cessna SIL ME75-17 and Cessna SIL ME79-32. 2. Inspect exhaust system components in accordance with the provisions of Table II of Cessna SIL No. ME79-32. 3. Replace multi-segment 'V' band exhaust clamps listed in Table III of Cessna SIL No. ME79-32. Note: FAA AD 75-23-08 R5 Amdt 39-5451 refers. Compliance: 1. At intervals not exceeding 50 hours time in service. 2. At intervals not exceeding 100 hours time in service. 3. At intervals not exceeding 750 hours time in service. This airworthiness directive becomes effective on 4 December 1997. Background: This amendment deletes the 421C series aeroplane from the AD applicability. This model aircraft has a modified exhaust system which is not subject to the defects addressed by this directive. Amendment 7 of this airworthiness directive became effective on 20 August 1992. Amendment 6 of this airworthiness directive became effective on 12 March 1987. The original issue of this airworthiness directive became effective on 31 March 1975.