AD/SF340/26 Amdt 2 Modification of Exit and Dome Light Assemblies (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/SF340/26 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.

SAAB SF340 Series Aeroplanes

AD/SF340/26 Amdt 2 Modification of Exit and Dome Light Assemblies 24/2009

Applicability:

SAAB SF340A-004 to -159 and SAAB 340B-160 to -179. As specified in SAAB-SCANIA AB Service Bulletin (SB) SAAB 340-33-030.

Requirement:

Action in accordance with SAAB-SCANIA AB SB 340-33-030 Revision 2.

The use of later approved revisions of the Requirement document is acceptable for compliance with the requirements of this AD.

Note 1:  Swedish AD No. 1-047 refers.

Compliance:

In accordance with the requirement document with a revised compliance date of 31 August 1992, unless already accomplished in accordance with the above Requirement document as contained in Amendment 1 of this AD.

This Amendment becomes effective on 28 January 2010.

Note 2:  The original issue of this Directive became effective on 30 April 1986.

Background:

The existing combination of power supply loads and the in-flight temperature gradient for the power packs in the emergency lighting system can lead to a reduction in the operating time below the required ten minutes.

Amendment 1 of this AD introduced FAA AD 92-03-05 and SAAB SB 340-33-030 Revision 2 as Requirement documents, replacing Swedish AD No. 1-047.  Also, the following Note was introduced “Revision 1 of SB 340-33-030 was issued for clarification of the text and correction of  part Nos. Revision 2 of SB 340-330030 was issued to allow certain aircraft to retain the existing emergency dome light bulb”.

This amendment includes editorial changes, redefines the applicability and removes reference to FAA AD 92-03-05 as a Requirement document.

William David
Delegate of the Civil Aviation Safety Authority

30 November 2009