AD/BAe 146/16 Amdt 8 Rear Spar Root Joint Attach Fittings at Wing Rib 2 (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/BAe 146/16 Amdt 7 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.

British Aerospace BAe 146 Series Aeroplanes

AD/BAe 146/16 Amdt 8 Rear Spar Root Joint Attach
Fittings at Wing Rib 2 1/2008

Applicability:

All Model BAe 146 aircraft, all serial numbers.

All Model AVRO 146-RJ aircraft, all serial numbers.

Requirement:

Action in accordance with EASA AD 2007-0270 R1.

Note 1:  BAE Systems Service Bulletin ISB 57-033 Revision 9, or later EASA approved revision, refers.

Note 2:  Revision 9 of the service bulletin applies to pre and post Modification HCM01447A attachment fitting installations.

Compliance:

As specified in the Requirement document, with a revised effective date of
17 January 2008.

This Amendment becomes effective on 17 January 2008.

Background:

This AD provides inspections to detect and correct the condition that leads to fuel leaks from bolt positions on the rear spar attachment of wing rib 2.

Amendment 7 introduced the latest revision of the related service bulletin, which specified additional calendar time based inspection criteria to control the stress corrosion failures of the pre and post modification HCM01447A attachment fitting installations.

Amendment 8 is issued in response to a revision of the related EASA AD, which clarifies that the calendar compliance times are to be counted from the AD effective date, not from the service bulletin issue date.

The original issue of this directive became effective on 31 August 1990.

David Villiers
Delegate of the Civil Aviation Safety Authority

27 November 2007