COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (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 747 Series Aeroplanes
AD/B747/299 Yaw Damper Actuator 1/2004
Applicability: Model 747-400, -400D, and -400F series aircraft, as listed in Boeing Alert Service Bulletin 747-27A2397, dated 24 July 2003.
Requirement: Action in accordance with the technical requirements of FAA AD 2003-23-01 Amdt 39-13364.
Compliance: As specified in the Requirement document, with a revised effective date of 22 January 2004.
This Airworthiness Directive becomes effective on 22 January 2004.
Background: This Directive requires an ultrasonic inspection of the yaw damper portion of the upper and lower rudder power control modules main manifold for cracking. Such cracking, unless detected and corrected, could result in an uncommanded left rudder hardover, consequent increased pilot workload, and possible runway departure upon landing.
David Villiers
Delegate of the Civil Aviation Safety Authority 5 December 2003
The above AD is notified in the Commonwealth of Australia Gazette on 24 December 2003.
Page 1 of 1
Overview
The Civil Aviation Safety Regulations 1998, as amended, form a critical framework for ensuring the safety of aircraft operations within Australia, particularly through the issuance of Airworthiness Directives (ADs) by the Civil Aviation Safety Authority (CASA). One such AD, issued in 2004, pertains specifically to the Boeing 747 Series Aeroplanes, identified as AD/B747/299. This directive was enacted to address an identified safety issue concerning the yaw damper actuator, which, if left unaddressed, could potentially lead to an uncommanded left rudder hardover. Such a condition could significantly increase pilot workload and potentially result in a runway departure upon landing, thereby posing a serious risk to flight safety. The AD mandates specific corrective actions in line with the technical requirements outlined by the Federal Aviation Administration (FAA) and necessitates compliance within a specified timeframe to mitigate these risks effectively. The enactment of this AD by CASA is a clear demonstration of the regulator's commitment to maintaining the highest standards of aviation safety in Australia.
Scope and Application
The Civil Aviation Safety Regulations 1998, specifically under Part 39, Section 105, mandates the Airworthiness Directives issued by the Civil Aviation Safety Authority (CASA). These directives apply to specific aircraft types, such as the Boeing 747 series aeroplanes, including the Model 747-400, -400D, and -400F, as identified in the Boeing Alert Service Bulletin. The AD in question, AD/B747/299, pertains to the yaw damper actuator and necessitates an ultrasonic inspection of the yaw damper portion of the upper and lower rudder power control modules main manifold for any cracking. This inspection is crucial to prevent potential issues such as uncommanded left rudder hardovers, which could lead to increased pilot workload and the risk of runway departure during landing. The directive requires adherence to the technical requirements outlined in FAA AD 2003-23-01 Amdt 39-13364, with a compliance date set for 22 January 2004. The AD was issued by David Villiers, a delegate of CASA, and became effective on 22 January 2004, as notified in the Commonwealth of Australia Gazette on 24 December 2003.
Key Provisions
The Civil Aviation Safety Regulations 1998, specifically under Part 39, section 105, include provisions for Airworthiness Directives (AD) issued by the Civil Aviation Safety Authority (CASA). These directives are designed to address safety concerns related to aircraft and aeronautical products. The specific AD/B747/299 pertains to Boeing 747 series aeroplanes and requires an ultrasonic inspection of the yaw damper portion of the upper and lower rudder power control modules main manifold to check for any cracking (CASR 1998, 39.1(1)).
The AD applies to Boeing 747-400, -400D, and -400F series aircraft, as identified in Boeing Alert Service Bulletin 747-27A2397 dated 24 July 2003 (CASR 1998, Applicability). The directive mandates that the inspection and any necessary corrective actions be carried out in line with the technical requirements of FAA AD 2003-23-01 Amdt 39-13364 (CASR 1998, Requirement). Compliance with these requirements must be achieved by 22 January 2004, as specified in the directive (CASR 1998, Compliance).
Entities governed by this AD are obligated to conduct the required ultrasonic inspection of the yaw damper manifold and to take corrective actions as specified in the FAA AD 2003-23-01 Amdt 39-13364. Failure to comply with this directive could result in severe safety issues, including uncommanded left rudder hardovers, increased pilot workload, and potential runway departures upon landing. The directive was issued by David Villiers, a delegate of the Civil Aviation Safety Authority, on 5 December 2003, and was published in the Commonwealth of Australia Gazette on 24 December 2003.