COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron 204 Series Helicopters AD/BELL 204/27 Amdt 1 External Cargo Suspension Kit - Load NK Restriction and Modification Applicability: All model 204B with External cargo suspension kit P/N 204-706-106-1. Requirement: 1. Restrict load on external cargo hook in accordance with Bell SB No. 204-78-1 until modified in accordance with Bell SB No. 204-78-4. 2. Modify external cargo suspension kit P/N 204-706-104-1 in accordance with Bell SB No. 204-78-4. Compliance: 1. On any flight utilising the external cargo hook. 2. Before 1 September 1978.