AD/F27/160 - MLG Sliding Member End-Stop (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.

Fokker F27 Series Aeroplanes AD/F27/160 MLG Sliding Member End-Stop 10/2009

Applicability: Model F27 Mark 500 and 600 aircraft, serial numbers 10452, 10525, 10530, 10531, 10550, 10557, 10559, 10566, 10569, 10589, 10603, 10605, 10606, 10613, 10615, 10623 through 10631, 10633, 10637, 10639, 10641, 10642, 10669 and 10672.

Note 1: The listed serial numbers are the only aircraft that have Rough Field Version (RFV) MLG installed. Requirement: Action in accordance with the requirements of EASA AD 2009-0145.

Note 2: Fokker Services SBF27/32-172 dated 26 January 2009, or later EASA approved revision, refers. Compliance: As specified in the Requirement document, with a revised effective date of 24 September 2009. This Airworthiness Directive becomes effective on 24 September 2009. Background: A Fokker 50 operator reported 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. Earlier F27 Mark 500 and 600 "RFV" aircraft are equipped with similar design MLG units. 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.