AD/F50/98 Amdt 1 - MLG Sliding Member End-stop (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/F50/98 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.

Fokker F50 (F27 Mk 50) Series Aeroplanes AD/F50/98 Amdt 1 MLG Sliding Member End-stop 4/2009

Applicability: Model F27 Mark 050, Mark 0502, and Mark 0604 aircraft, all serial numbers. Requirement: Action in accordance with the requirements of EASA AD 2009-0018.

Note: Fokker Services Service Bulletin SBF50-32-039 original issue, or later EASA approved revision, and Messier Dowty Service Bulletin SB F50-32-62 original issue, or later EASA approved revision, refer. Compliance: As specified in the Requirement document, with a revised effective date of 9 April 2009. This Amendment becomes effective on 9 April 2009. Background: A report was received of an over-extended main landing gear sliding member after landing. Investigation revealed that an end stop had unscrewed, and that no lockwire was present on the two lockbolts which hold the end stop. This condition, if not corrected, could lead to structural damage of the main gear and loss of control of the aircraft during the landing roll.

Amendment 1 is issued in response to a new EASA AD. This EASA AD supersedes the previous CAA-NL AD because a change in EASA AD policy now allows the issue of Mandatory Continuing Airworthiness action to require correction of unsafe conditions, resulting from production and/or maintenance deficiencies. There is no change to the technical requirements of this Directive.