Document ID: chunk:federal_register_of_legislation:F2009L03393:body:0
Version: federal_register_of_legislation:F2009L03393
Segment Type: other
Provision Reference: 
Character Range: 0–1936

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 39.001(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.

Boeing 747 Series Aeroplanes
AD/B747/395  Fuselage Stringer 11 Longeron  10/2009
             between Station 2598 to 2607

Applicability:  All Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D,
                -400F, 747SR and 747SP series aircraft.
Requirement:    Action in accordance with the technical requirements of FAA AD 2009-12-08 Amdt 39-15931.

                Note:  Boeing Service Bulletin 747-53A2703 Revision 1, or later FAA approved revision, refers.
Compliance:     As specified in the Requirement document, with a revised effective date of
                24 September 2009.
                This Airworthiness Directive becomes effective on 24 September 2009.
Background:     The FAA received a report of a crack in the fuselage right-side Stringer 11 longeron horizontal flange, adjacent to the horizontal stabiliser pivot bulkhead, during a routine maintenance inspection.  Such fatigue cracking, unless detected and corrected, could propagate and cause damage to the adjacent horizontal stabiliser pivot bulkhead.  This damage could result in loss of structural integrity and consequent inability of the bulkhead to carry flight loads.

David Villiers
Delegate of the Civil Aviation Safety Authority

12 August 2009