Document ID: chunk:federal_register_of_legislation:F2005L02395:body:0:p2
Version: federal_register_of_legislation:F2005L02395
Segment Type: other
Provision Reference: 
Character Range: 2853–5052

test must be completed within 16 months time in service from 12 August 1999.  Thereafter, repeat the displacement test at intervals not exceeding 24,000 flight hours.
                     b. For aeroplanes equipped with a PCU having P/N 65-44861-12 and serial number 3509A or lower or P/N 65C37053-(XX), the test must be completed within 16 months time in service from 12 August 1999.  Thereafter, repeat the displacement test at intervals not exceeding 24,000 flight hours.

                     c. For Model 737-600, -700 and -800 aeroplanes having line numbers 1 through 222 inclusive that are equipped with PCU's having P/N 251A301-(XX) and serial number 299 or lower, conduct the test within 16 months time in service from 12 August 1999.  Thereafter, repeat the displacement test at intervals not exceeding 24,000 flight hours.

                     d. For all other aeroplanes, conduct the test prior to the accumulation of 24,000 total flight hours or within 30 days from the effective date of this Directive, whichever is the later.  Thereafter, repeat the displacement test at intervals not exceeding 24,000 flight hours.

                   2. Prior to further flight.

                   3. After 30 November 2000.

                   The compliance times remain unchanged by this issue.
                This Amendment becomes effective on 29 September 2005.
Background:     As part of the rudder system improvement programme, this Directive was introduced to detect cracks in the secondary slide in the dual concentric servo valve of the rudder PCU.  This Directive reflects a Country of Origin Airworthiness Directive.

                Amendment 1 reflected a number of corrections to the original directive mandated by the Country of Origin AD.

                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 99-11-05, the Requirement document of this Directive.

                The original issue of this Airworthiness Directive became effective on 12 August 1999.

David Punshon
Delegate of the Civil Aviation Safety Authority

19 August 2005