Document ID: chunk:federal_register_of_legislation:F2005L02396:body:0:p2
Version: federal_register_of_legislation:F2005L02396
Segment Type: other
Provision Reference: 
Character Range: 2883–4279

after 26 February 1998.

                4. Within 24 months after 26 February 1998.

                5. Within 24 months after 26 February 1998.

             The compliance times remain unchanged by this issue.
             This Amendment becomes effective on 29 September 2005.
Background:  This AD makes compliance with a Boeing ASB mandatory.  The Boeing ASB gives instructions to ensure that the secondary servo slide in the dual servo valve of the rudder PCU operates correctly.  The ASB also requires the replacement of the vernier control rod and two dual loadpath bolts in the rudder PCU assembly.  The eventual aim of the ASB is to have all rudder PCUs replaced with a modified item which is not prone to jamming.

             Previous Boeing Service Bulletins and FAA ADs had addressed some of the problems identified with the rudder control system, but this latest bulletin incorporates a comprehensive test, inspection and component replacement procedure which overcomes the possible effects of a jam in the secondary slide of the rudder PCU assembly.

             Amendment 2 is issued in response to FAA AD 2002-20-07, which requires incorporation of a new rudder control system; which when incorporated, supersedes the requirements of AD 97-14-04, the Requirement document of this Directive.

David Punshon
Delegate of the Civil Aviation Safety Authority

19 August 2005