AD/PHZL/74 Amdt 2 - Two Blade 'Y" Shank Aluminium Hub (Cth)

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/PHZL/74 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.

Propellers - Variable Pitch - Hartzell AD/PHZL/74 Amdt 2 Two Blade 'Y" Shank Aluminium Hub 6/2012

Applicability: 1. () HC- () 2Y()- () propellers (also known as Y-shank propellers) that have a hub serial number with "A", "E", or no suffix, and installed on or previously installed on:

a. 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 aerobatic category; or

d. Any aircraft routinely exposed to aerobatic manoeuvres; or

e. Any aircraft that has been used for agricultural operations whilst the applicable propeller was installed.

Note 1: This AD does not apply to propellers with the suffix letter "B" at the end of the hub serial number.

Note 2: Incorporation of a "B" suffix hub will provide terminating action for this Directive.