AD/B747/380 Amdt 2 - External Skin Doublers (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/B747/380 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.

Boeing 747 Series Aeroplanes AD/B747/380 Amdt 2 External Skin Doublers 5/2009

Applicability: Model 747-100, -100B, -200B, -200C, -200F, -300, 747SR, and 747SP series aircraft as identified in Boeing Alert Service Bulletin 747-53A2748 dated 9 May 2008, or later FAA approved revision. Requirement: Action in accordance with the technical requirements of FAA AD 2009-04-16 Amdt 39-15822. Compliance: As specified in the Requirement document, with a revised effective date of 7 May 2009. This Amendment becomes effective on 7 May 2009. Background: The FAA received a report of cracked fastener holes at the right S-6 lap splice between STA 340 and STA 380. Undetected cracking in the fuselage skin could result in rapid decompression and loss of structural integrity.

Amendment 1 included the referenced ASB in applicability to identify specifically affected aircraft.

Amendment 2 is issued in response to a new FAA AD, which mandates the previously optional terminating action.

David Villiers Delegate of the Civil Aviation Safety Authority