Document ID: chunk:federal_register_of_legislation:F2009L01500:body:0:p2
Version: federal_register_of_legislation:F2009L01500
Segment Type: other
Provision Reference: 
Character Range: 2873–4425

October 2008.

             For Requirement 2 - Within 12 months from the effective date of this AD.

             For Requirement 3 - Depending on the result of the inspection conducted in Requirement 1 or 2 of this AD, as applicable, within the time interval as indicated in Table 2 on page 8 of the referenced Fokker SB.

                For Requirement 4 - Within 5 years after the 25 October 2007.

                For Requirement 5 - Within 5 years after the effective date of this AD.

                For Requirement 6 - From 29 August 2012.

             For Requirement 7 - From 3 March 2014.
             This Amendment becomes effective on 7 May 2009.
Background:  Excessive wear and tear of the backlash remover mechanism has been found several times.  The wear and tear may result in a (partly) blocked operation of the elevator system in the normal (hydraulic) mode.  Together with the manufacturer of this equipment (Goodrich) it has been decided to modify the Elevator Booster Control Unit in accordance with Goodrich Component Service Bulletin (CSB) 23400-27-27.  In order to detect and correct an excessively worn backlash remover mechanism, this AD required a one-time inspection and eventual replacement of the affected Elevator Booster Control Units.

             Amendment 1 includes inspections for addition BCUs and eventual replacement of all affected units.

             The original issue of this AD became effective on 25 October 2007.

James Coyne
Delegate of the Civil Aviation Safety Authority

26 March 2009