Document ID: chunk:federal_register_of_legislation:F2006L01312:body:0:p1
Version: federal_register_of_legislation:F2006L01312
Segment Type: other
Provision Reference: 
Character Range: 0–3062

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/68 Amdt 3 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/68 Amdt 4  Turbine Engine; Steel Hub Propellers  7/2006 DM

Applicability:  All Hartzell model HC-A3VF-7( ), HC-B3TF-7( ), HC-B3MN-3( ), HC-B3TN-2 ( ), HC-B3TN-3( ), HC-B3TN-5( ), HC-B4MN-5( ), HC-B4MP-3( ), HC-B4TN-3( ),
                HC-B4TN-5( ), HC-B5MA-3( ), HC-B5MP-3( ), HC-B5MP-5( ), HC-B3MN-5( ), HC-B3TN-4( ), HC-B4MP-4( ) and HC-B5MN-3( ) propellers with hub serial numbers (S/N) as listed in Table 1 of this Directive.
Requirement:       1. Replace affected propeller hubs as listed by serial number (S/N) in Table 1 with hubs not listed by S/N in Table 1.

                   The two-letter prefix of some existing propeller hub serial numbers may be followed by a third letter 'A.'  The presence or absence of this letter has no significance in determining compliance.

                   Since a hub may be used in various propeller models, the S/N and the model number shown in Table 1 of this AD may not coincide.  Precedence is given to the hub S/N in determining compliance requirements.  The hub model is only given as a reference.

                   2. Perform a fluorescent penetrant inspection of blades for cracks as per Hartzell Aluminium Blade Manual 133C.

                   3. Carry out Magnetic Particle Inspection of the Blade clamps as per Hartzell Service Manual 202A.
                Note 1:  FAA AD 96-18-14 Amdt 39-9738 refers.
Compliance:        1. As listed for the applicable S/N hubs as listed in Table 1 of this Directive.

                   Hub replacement must be accomplished by the end of the calendar month indicated at the top of the appropriate column in Table 1 of this AD.  The S/N ranges in this table identify the propeller hubs that require replacement by the end of that month.

                   2. At Propeller disassembly for hub replacement.

                   3. At Propeller disassembly for hub replacement.

                                        This Amendment becomes effective on 3 May 2006.
               Background:              This Directive was originally issued to address several hub, blade, and shank failures reported overseas on Mitsubishi MU-2 aircraft.  In one incident, an aircraft was involved in a fatal accident.  Due to the similarity of construction and load transfer