Federal Register of Legislation - Australian Government

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AD/AB139/1 - Cockpit Door and Windows

Authoritative Version
AD/AB139/1 Airworthiness Directives/Pt 105 — Aircraft as made
Cockpit Door and Windows
Administered by: Infrastructure and Transport
Exempt from sunsetting by the Legislative Instruments Act 2003 s 54(2) item 9
Registered 30 Jul 2007
Tabling HistoryDate
Tabled HR07-Aug-2007
Tabled Senate07-Aug-2007
Date of repeal 13 Mar 2008
Repealed by AD/AB139/1 Amdt 1 - Cockpit Door and Windows



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.

Agusta AB139 and AW139 Series Helicopters


Cockpit Door and Windows

10/2007 DM



Model AB139 helicopters, serial numbers 31005 through 31054, except 31007.

Model AW139 helicopters, serial numbers 31055 through 31080, and 41001, except 31068, 31073, and 31074.


1.    For AB139 helicopters with serial numbers 31005, 31020, 31022, 31024, 31032, 31038, and 31052:

Accomplish the requirements of Agusta Technical Bulletin (BT) 139-087 original issue, or later EASA approved revision.

2.    For all other affected AB139 and AW139 helicopters:

Accomplish the requirements of Agusta BT 139-087 original issue, or later EASA approved revision.

Note:  EASA AD 2007-0142 refers.


1.    Before 31 August 2007, unless already accomplished.

2.    Within 300 flight hours or 6 months after 31 July 2007, whichever occurs first.


This Airworthiness Directive becomes effective on 31 July 2007.


Operators have reported a number of occurrences of in-flight loss of cockpit door windows, both left and right side.  Loss of a window could result in damage to critical components.  This Directive requires verification of the correct geometry of the door frame and the window seal installation, and installation of an improved seal.

David Punshon
Delegate of the Civil Aviation Safety Authority

27 July 2007