AD/B747/361 Flight Station Windows No. 2 and No. 3 (Cth)

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/B747/361 Flight Station Windows No. 2 and No. 3 10/2007

Applicability:

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 2007-15-10 Amdt 39-15139.

Note:  Boeing Alert Service Bulletin 747-56A2012 original issue, or later FAA approved revision, refers.

Compliance:

As specified in the Requirement document, with a revised effective date of
27 September 2007.

This Airworthiness Directive becomes effective on 27 September 2007.

Background:

The FAA received a report of the in-flight loss of a No. 3 flight station window.  The actions required by this Directive are intended to detect and correct cracking in the fail-safe interlayer of certain No. 2 and No. 3 flight station glass windows, which could result in loss of the window and consequent rapid loss of cabin pressure.

David Villiers
Delegate of the Civil Aviation Safety Authority

14 August 2007