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 revokes Airworthiness Directive (AD) AD/B747/71 and issues the following 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/B747/71
Amdt 1
Cavity Aft of Wing Centre Section 10/2003
Applicability: All Model 747 series aircraft.
Requirement: Action in accordance with the technical requirements of FAA AD 2003-11-01 Amdt 39-13160.
Note: Boeing Alert Service Bulletin 747-51A2057 refers.
Compliance: As specified in the Requirement document, with a revised effective date of 2 October 2003.
This Amendment becomes effective on 2 October 2003.
Background: Debris and foreign material may block drainage of the cavity aft of the wing centre section and result in accumulated water leakage onto the lateral flight control cables and/or components and freezing; which could restrict or jam control cable movement and result in loss of controllability of the aircraft.
Amendment 1 is issued in response to a new FAA AD, which adds new repetitive tests and inspections for discrepancies of the drainage system of the canted pressure deck.
David Villiers
Delegate of the Civil Aviation Safety Authority 1 August 2003
The above AD is notified in the Commonwealth of Australia Gazette on 10 September 2003.
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Overview
The Civil Aviation Safety Regulations 1998, as amended by the Civil Aviation Safety Authority (CASA) in 2003, introduced Airworthiness Directive (AD) AD/B747/71 Amendment 1 to address safety concerns related to the Boeing 747 series aircraft. This legislative instrument was enacted to respond to the risk of debris and foreign material obstructing the drainage system of the cavity aft of the wing centre section, which could potentially lead to water accumulation and freezing, thereby causing restricted or jammed control cable movement and loss of controllability. This amendment was issued in response to a new Federal Aviation Administration (FAA) AD, which mandated additional repetitive tests and inspections for the drainage system of the canted pressure deck. The directive applies to all Model 747 series aircraft and requires compliance with the technical requirements of FAA AD 2003-11-01 Amendment 39-13160, effective from 2 October 2003. The purpose of this amendment was to ensure the continued airworthiness and safety of the Boeing 747 series aircraft by mitigating the identified risk.
Scope and Application
The Airworthiness Directive (AD) issued under the Civil Aviation Safety Regulations 1998 applies specifically to all Boeing 747 series aircraft, encompassing any person or entity that owns, operates, or maintains such aircraft within Australia or internationally, as the regulations are enforced by the Civil Aviation Safety Authority (CASA). This directive mandates corrective action to address a potential safety issue concerning the drainage cavity aft of the wing centre section, which if not addressed, could lead to water accumulation, freezing, and subsequent restrictions in the movement of lateral flight control cables, potentially resulting in loss of aircraft controllability. The directive requires compliance with the technical requirements outlined in FAA AD 2003-11-01 Amdt 39-13160 and incorporates Boeing Alert Service Bulletin 747-51A2057. The AD mandates specific actions, including repetitive tests and inspections as stipulated, with a compliance deadline set for 2 October 2003. Notably, this AD is not subject to any exclusions or exemptions and applies uniformly to all Model 747 series aircraft. This directive is part of a broader regulatory framework and is subject to possible extensions or modifications through subordinate instruments issued by CASA.
Key Provisions
The Civil Aviation Safety Regulations 1998, under PART 39 - 105, include specific provisions for airworthiness directives (ADs) aimed at ensuring the safety of aircraft operations. Section 39.1(1) empowers the Civil Aviation Safety Authority (CASA) delegate to issue these directives to address unsafe conditions in aircraft or aeronautical products. In this instance, AD/B747/71, previously revoked, is replaced by a new AD addressing a specific safety concern with Boeing 747 series aircraft. The AD requires certain actions to be taken in relation to the cavity aft of the wing centre section to prevent debris and foreign material from blocking drainage, which could lead to water leakage and freezing, potentially causing loss of controllability (section 10/2003).
The obligations imposed by this AD on the parties governed include ensuring that the specified action, which is to follow the technical requirements of FAA AD 2003-11-01 Amdt 39-13160, is undertaken. This means that all operators of Boeing 747 series aircraft must adhere to the detailed instructions provided in the AD. Additionally, the AD mandates compliance with the revised effective date specified in the requirement document, which has been set to 2 October 2003, as outlined in the compliance section of the AD.
Failure to comply with the AD may result in significant consequences. While the specific penalties are not detailed in the provided text, non-compliance with ADs under CASR 1998 generally results in civil or criminal penalties. These can include fines and, in severe cases, criminal prosecution. The exact penalties would be determined based on the specific nature and severity of the breach, as well as the regulatory framework governing civil aviation safety in Australia. It is crucial for operators to adhere to the AD to avoid these potential repercussions and ensure the continued safety of their aircraft.