AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/BEECH 90/86 Amdt 1 and issues the following AD under subregulation 39.001(1) of CASR 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. Beechcraft 90 and 65-90 (King Air) Series Aeroplanes AD/BEECH 90/86 Amdt 2 Rudder Trim Tab 9/2006 Applicability: Group 1 aircraft: Models 65-90, 65-A90, B90, C90, and C90A aircraft, serial numbers LJ-1 through LJ-1280. Model E90 aircraft, serial numbers LW-1 through LW-347. Group 2 aircraft: Model C90A aircraft, serial numbers LJ-1281 through LJ-1732. Requirement: For Group 1 aircraft: 1. Inspect the rudder trim tab for proper moisture drainage provisions in accordance with Beech Service Bulletin (SB) No. 2365 Revision 1. If the correct drainage provisions do not exist, before further flight, modify the rudder trim tab in accordance with SB No. 2365 Revision 1. For Group 2 aircraft: 2. Inspect the rudder trim tab for proper moisture drainage provisions in accordance with SB No. 2365 Revision 2. If the correct drainage provisions do not exist, before further flight, modify the rudder trim tab in accordance with SB No. 2365 Revision 2. Note: FAA AD 2006-13-10 Amdt 39-14663 refers. Compliance: 1. Within 150 hours time in service after 25 June 1992, unless already accomplished. 2. Within 150 hours time in service after 31 August 2006, unless already accomplished. The compliance time for Requirement 1 remains unchanged by this issue. This Amendment becomes effective on 31 August 2006. Background: The FAA received reports of trapped water in the rudder trim tabs on several of the affected aircraft. The cause was attributed to improper drainage provisions. The freeze-thaw action of trapped water may cause structural damage and could result in control surface flutter due to an out of balance condition. Amendment 1 extended applicability to additional serial numbered aircraft. Amendment 2 is issued in response to a new FAA AD, which extends applicability to additional Model C90A aircraft. David Villiers Delegate of the Civil Aviation Safety Authority 19 July 2006