AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/CRESCO/4 and issues the following AD under subregulation 39.1 (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.
Pacific Aerospace Corporation Cresco Series Aeroplanes
AD/CRESCO/4
Amdt 1
Rudder Top Hinge 6/2004
Applicability: All Cresco 08-600 series aircraft.
Requirement: | 1. | Accomplish the following:
a. Perform a close visual inspection of the rudder top hinge. |
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| b. Cycle rudder between control stops and inspect upper rib for cracking around the two rivets that retain the hinge bolt nut plate. Refer items 32 and 33, IPC Chapter 27 Figure 5. |
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| c. Apply longitudinal and lateral loads to rudder. Ensure no radial freeplay is present. |
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| If any cracking, damage, or excessive freeplay is detected, repair or replace the rudder before further flight. |
| 2. | Modify rudder top rib assembly by incorporation of Pacific Aerospace Modification PAC/CR/0427 in accordance with Service Bulletin PACSB/CR/034. |
Note: NZ CAA AD DCA/CRESCO/5A refers.
Compliance: 1. Within 100 hours time in service after 19 February 2004, and thereafter at intervals not to exceed 100 hours time in service until compliance with Requirement 2.
2. Within 1,000 hours time in service after 10 June 2004, or before 25 March 2006, whichever occurs first.
The compliance time of Requirement 1 remains unchanged by this issue. This Amendment becomes effective on 10 June 2004.
Background: Numerous reports were received of failed rudder top hinges. Cracking and damage to the rudder top hinge could restrict rudder control and result in loss of control of the aircraft. The actions required by this Directive are intended to be interim until the manufacturer develops a modification.
Pacific Aerospace Corporation Cresco Series Aeroplanes
AD/CRESCO/4 Amdt 1 (continued)
Amendment 1 is issued in response to a revision of the related NZ CAA AD, which requires modification action in lieu of on-going repetitive inspections.
David Villiers
Delegate of the Civil Aviation Safety Authority 28 April 2004
The above AD is notified in the Commonwealth of Australia Gazette on 19 May 2004.