COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Eurocopter AS 355 (Twin Ecureuil) Series Helicopters AD/AS 355/47 Amdt 1 MGB Suspension Bi-Directional Cross Beam 9/97 Applicability: Model AS 355, versions E, F, F1, F2, and N, fitted with a MGB suspension bi- directional cross beam P/N 350A38.1018, all dash numbers installed on the complete cross beam assemblies P/N 350A38.0210, all dash numbers without Mod No. 072720 embodied. Requirement: Action in accordance with EUROCOPTER FRANCE AS 355 SB 05.00.29. Note: DGAC AD 96-155-053(B)R1 refers. Compliance: Within 30 hours time in service after 4 September 1996; as applicable. Thereafter as specified in the requirement document. The initial issue of this directive had effect from 4 September 1996 and the compliance remains unchanged. This amendment has effect from 14 August 1997. Background: The manufacturer received an in-service report of a crack in the MGB suspension cross beam. Amendment 1 alters the Applicability to remove certain modified assemblies, and reference the manufacturer's definitive Service Bulletin.