AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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. Propellers - Variable Pitch - Hartzell AD/PHZL/75 Propeller Hub Replacement 3/2003 Applicability: Hartzell 2 Bladed "Y" shank propellers fitted with aluminium hub part numbers D- 6522-1, D-6522-2, D-6529-1, and D-6559-3 with a hub serial number that is listed in Table 1 of this Directive. Requirement: Remove from service applicable Hartzell aluminium hubs in accordance with Hartzell ASB HC-ASB-61-259. Note 1: FAA AD 2003-01-03 Amdt 39-13014 refers. Note 2: Hubs listed in Table 1 of this Directive are not to be installed. Compliance: 1. Within 50 hours propeller hub time since new or 12 months from the effective date of this Directive, whichever occurs first, for propeller hubs installed on: 1. Piper PA-32 series aircraft with Textron Lycoming 540 series engines that are rated at 300HP or higher; or b. Pilatus Britten Norman or Britten Norman BN-2 series aircraft (also known as Islander or Trislander) with Textron Lycoming 540 series engines; or c. Any aircraft certified in the acrobatic category; or d. Any aircraft routinely exposed to acrobatic manoeuvres; or e. Any aircraft that has been used for agricultural operations whilst the applicable propeller was installed. 2. For propeller hubs installed on aircraft apart from those listed in Paragraph 1, within 100 hours propeller hub time since new or twelve months from the effective date of this Directive, whichever occurs first. Propellers - Variable Pitch - Hartzell AD/PHZL/75 (Continued) Table 1. Applicable Propellers and Hubs Propeller S/N Hub S/N Hub P/N AU11115B A61365B D-6522-1 AU11116B A61366B D-6522-1 AU11117B A61367B D-6522-1 AU11119B A61369B D-6522-1 AU11125B A61375B D-6522-1 AU11131B A61381B D-6522-1 AU11134B A61384B D-6522-1 AU11135B A61385B D-6522-1 AY515B A61397B D-6522-2 AY516B A61398B D-6522-2 CH36140B A61409B D-6529-1 CH36141B A61410B D-6529-1 CH36151B A61420B D-6529-1 CH36152B A61421B D-6529-1 CH36153B A61422B D-6529-1 CH36157B A61427B D-6529-1 EU376B A61443B D-6559-3 CH36172B A61547B D-6529-1 CH36159B A61553B D-6529-1 CH36160B A61554B D-6529-1 CH36162B A61556B D-6529-1 CH36163B A61557B D-6529-1 Propellers - Variable Pitch - Hartzell AD/PHZL/75 (Continued) CH36165B A61560B D-6529-1 CH36188B A61563B D-6529-1 CH36193B A61568B D-6529-1 CH36194B A61569B D-6529-1 CH36195B A61570B D-6529-1 CH36196B A61571B D-6529-1 CH36178B A61573B D-6529-1 CH36179B A61574B D-6529-1 CH36181B A61576B D-6529-1 CH36182B A61577B D-6529-1 CH36183B A61578B D-6529-1 CH36198B A61583B D-6529-1 CH36199B A61584B D-6529-1 CH36200B A61585B D-6529-1 CH36201B A61586B D-6529-1 CH36202B A61587B D-6529-1 CH36203B A61588B D-6529-1 CH36204B A61589B D-6529-1 CH36205B A61590B D-6529-1 CH36209B A61594B D-6529-1 CH36211B A61596B D-6529-1 CH36212B A61597B D-6529-1 CH36213B A61598B D-6529-1 CH36215B A61601B D-6529-1 Propellers - Variable Pitch - Hartzell AD/PHZL/75 (Continued) CH36216B A61602B D-6529-1 AU11145B A61603B D-6522-1 AU11147B A61605B D-6522-1 AU11155B A61613B D-6522-1 AY520B A61743B D-6522-2 AU11175B A61893B D-6522-1 This Airworthiness Directive becomes effective on 20 March 2003. Background: The manufacturer has advised of a quality problem with forgings received from their supplier. The quality problems could lead to cracks forming and ultimately the failure of the propeller. James Coyne Delegate of the Civil Aviation Safety Authority 4 February 2003 The above AD is notified in the Commonwealth of Australia Gazette on 26 February 2003.