Document ID: chunk:federal_register_of_legislation:F2012L00560:body:0:p1
Version: federal_register_of_legislation:F2012L00560
Segment Type: other
Provision Reference: 
Character Range: 0–3147

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.

                   2. () HC- () 2Y()- () propellers S/N's listed in Table 1:

                       Table 1. () HC- () 2Y()- () propellers with the following S/N's
                DN3607A  DN3609A  DN3613A  DN3615A
                DN3628A  DN3630A  DN3641A  DN3940A
                DN3944A  DN3949A  DN3962A

Requirement:     1. Eddy Current Inspection:

                   a. No Suffix: For propeller hubs without any serial number suffix carry out an Eddy Current Inspection (ECI) of the propeller hub fillet radius for cracks in accordance with Hartzell SB HC-SB-61-227 Revision 5 dated September 28, 2006 or later FAA approved revision.

                   b. If no cracks are found then permanently mark the end of the hub serial number with the suffix "E" in accordance with Hartzell SB HC-SB-61-227 Revision 5 dated September 28, 2006 or later FAA approved revision.

                   c. E Suffix: For propeller hubs with serial number suffix "E" carry out repetitive Eddy Current Inspections (ECI) of the propeller hub fillet radius for cracks in accordance with Hartzell SB HC-SB-61-227 Revision 5 dated September 28, 2006 or later FAA approved revision.

                   d. Table 1: For propeller hubs with a serial number hub listed