AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BN-2/57 Amdt 1 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section. Pilatus Britten-Norman BN-2 Series Aeroplanes AD/BN-2/57 Amdt 2 Engine Air Intake Hose 5/2002 Applicability: All BN-2 series aircraft fitted with Textron Lycoming IO-540 series engines and not fully incorporating modification NB-M-1615 "Alternative Air Intake Hose". Requirement: 1. Carry out a visual inspection of the engine air intake hose in accordance with B- N Group Ltd. Service Bulletin (SB) Number SB 95 - Issue 5. 2. Replace a defective air intake hose in accordance with B-N Group Ltd. SB Number SB 95- Issue 5. Note: B-N Group Ltd Service Bulletin SB 95-Issue 5 has been declared mandatory by the CAA(UK). Compliance: 1. Unless previously accomplished in accordance with a previous issue of this Directive, within 5 hours time in service effective 16 May 2002 and thereafter at intervals not to exceed 60 hours time in service. 2. Before further flight. This Amendment becomes effective on 16 May 2002. Background: This Directive was originally issued to require an inspection of the engine air intake hose. The requirement followed reports of engine power loss events resulting from failure of the air intake hose. This amendment reflects the aircraft manufacturer's revision of the requirement document. The revision, in part, provides a terminating action. Aircraft incorporating the alternative air intake hose on both engines are not subject to the requirements of this Directive. Pilatus Britten-Norman BN-2 Series Aeroplanes AD/BN-2/57 Amdt 2 (Continued) The original issue of this Airworthiness Directive became effective on 24 January 1996. Amendment 1 of this Directive became effective on 14 August 1996. Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority 7 April 2002 The above AD is notified in the Commonwealth of Australia Gazette on 24 April 2002.