Document ID: chunk:federal_register_of_legislation:F2005L02396:body:0:p1
Version: federal_register_of_legislation:F2005L02396
Segment Type: other
Provision Reference: 
Character Range: 0–3193

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/B737/113 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.

Boeing 737 Series Aeroplanes
AD/B737/113 Amdt 1  Rudder Power Control Unit Replacement  10/2005

Applicability:  Model 737 series aeroplanes, having a main rudder power control unit (PCU) and vernier control rod bolts that are identified in Boeing Alert Service Bulletin (ASB) 737-27A1202 Revision 2, dated August 7, 1997.
Requirement:       1. Perform the test requirements of Part I of the Accomplishment Instructions of Boeing ASB 737-27A1202.

                   2. Replace the rudder PCU in accordance with Part II of the Accomplishment Instructions of Boeing ASB 737-27A1202.

                   3. Replace the dual servo valve and a bolt in the PCU in accordance with Part III of the Accomplishment Instructions of Boeing ASB 737-27A1202.

                   4. Replace the vernier control rod and two dual load path bolts in accordance with Part IV of the Accomplishment Instructions of Boeing ASB 737-27A1202.

                   5. Replace two nutplates on the control rod in accordance with Part V of the Accomplishment Instructions of Boeing ASB 737-27A1202.

                Accomplishment of the requirements of AD/B737/201 (FAA AD 2002-20-07) constitutes terminating action for the requirements of this Directive.

                Note 1:  Some aircraft may already meet some of the requirements of Boeing ASB 737-27A1202 through compliance with previous CASA ADs (B737/79 and B737/99), however, these aircraft may still require on-going inspections and/or component replacement dependent on the scope of previous actions completed.  This directive supersedes AD/B737/79 & AD/B737/99.  Pending the cancellation of ADs B737/79 & 99, compliance with this directive can be considered as achieving compliance with ADs/B737/79 & 99.

                Note 2:  FAA ADs 97-14-04, 96-23-51 and 94-01-07 all refer to inspection, test and replacement actions on Boeing 737 rudder systems and are all referenced in Boeing ASB 737-27A1202.

Compliance:     1. To be completed every "A" check and every time a PCU is replaced.

                2. Within 24 months after 26 February 1998.

                3. Within 24 months 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