AD/B737/110 Amdt 2 - Rudder Yaw Damper Valve Replacement (Cth)

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/B737/110 Amdt 1 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/B737/110 Amdt 2 Rudder Yaw Damper Valve Replacement 10/2005

Applicability: Model 737-100, -200, -300, -400, and -500 series aeroplanes. Requirement: 1. Unless already accomplished, perform a one time inspection of the engage solenoid valve of the yaw damper to determine the Part Number (P/N) of the valve.

2. If any valve having one of the following part numbers is installed;

Parker P/N 59600-5011 (Boeing P/N 10-60811-9); or

Parker P/N 59600-5007 (Boeing P/N 10-60811-3 (see Note 3)); or

Parker P/N 59600-5003 (Boeing P/N 10-60811-1).

replace it with one of the following valves;

Parker P/N 881600-1001 (Boeing P/N 1060811-13), or

Sterer P/N 45080-1 (Boeing P/N 10-60811-8), or

Sterer P/N 45080 (Boeing P/N 10-60811-3 (see Note 3).

The above actions are to be accomplished in accordance with procedures specified in Chapter 22-11-61 or Chapter 22-12-21 (for 737 -100 and -200 series aircraft) of the Boeing Maintenance Manual as applicable; or Chapter 22-12-21 (for 737-300, -400, and -500 series aircraft) of the Boeing Maintenance Manual.