COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 400 Series Aeroplanes AD/CESSNA 400/20 Amdt 1 Emergency Exit Window - Modification 5/71 Applicability: All model 401, 401A and 401B with S/Nos. 401-0041 to 401B-0052. All model 402, 402A and 402B with S/Nos. 402-0041 to 402B-0030. Model 411 and 411A with S/Nos. 411-0235 to 411A-0300. Document: Cessna SL ME70-30 (Supplement 1). Compliance: Within 100 hours time in service after 30 June 1971. Note: Compliance with the preceding issue of this Directive satisfies compliance with this issue of the Directive.