COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 747 Series Aeroplanes
AD/B747/25 Wing Leading Edge Flap System - Modification 1/81
Applicability: All models 747.
Document: 1. FAA AD 80-19-05, Amdt. 39-3906; or
2. Boeing SB No. 747-27-2204.
Compliance: As per requirement document No. 1.
Background: Investigation has revealed that a single electrical fault in the leading edge flap circuits could cause an unscheduled deployment of the flaps.
Overview
The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia's Parliament, serve to regulate civil aviation safety and include provisions to address identified gaps and issues within the industry. A specific legislative instrument within this regulation, F2006B03148, addresses the safety concerns associated with the Boeing 747 Series aeroplanes by issuing an airworthiness directive aimed at mitigating risks related to the wing leading edge flap system. This directive, AD/B747/25, mandates modifications to prevent unscheduled flap deployment due to electrical faults, ensuring the continued safety and reliability of the aircraft in operation.
The policy objective underpinning this legislative instrument is to enhance aviation safety by mandating specific modifications to the Boeing 747 Series aeroplanes' wing leading edge flap system, thereby reducing the risk of unscheduled flap deployment caused by electrical faults. By aligning with the Federal Aviation Administration's Advisory Directive 80-19-05 and Boeing Service Bulletin No. 747-27-2204, the directive ensures compliance with established safety standards and promotes a uniform approach to addressing safety issues across the aviation industry.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105 concerning the Civil Aviation Safety Authority's Schedule of Airworthiness Directives, governs the application of AD/B747/25 for Boeing 747 series aeroplanes. This legislation applies to all models of the Boeing 747, mandating modifications to the wing leading edge flap system to prevent unscheduled flap deployment caused by a single electrical fault in the flap circuits. The directive is underpinned by the Federal Aviation Administration's AD 80-19-05, Amendment 39-3906, or Boeing Service Bulletin No. 747-27-2204, which outlines the required compliance measures. The regulations are enforced nationally within Australia, ensuring that all operators of Boeing 747 aircraft must adhere to the specified modifications to maintain airworthiness. There are no stated exclusions or exemptions within the directive, and compliance is mandatory for all relevant aircraft, operators, and maintenance entities within the Commonwealth. Subordinate instruments may extend or further specify the requirements of this directive to address any emerging issues or technical updates.
Key Provisions
The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105 and the Boeing 747 Series Aeroplane Airworthiness Directive AD/B747/25, address modifications required for the wing leading edge flap system. Section 39 - 105 outlines the necessity for compliance with airworthiness directives, while AD/B747/25 details the specific modifications needed to mitigate risks associated with electrical faults in the leading edge flap circuits. The requirement is to follow either FAA AD 80-19-05, Amendment 39-3906, or Boeing Service Bulletin No. 747-27-2204 (section 1/81). This directive applies to all models of the Boeing 747 series.
The obligations imposed by these regulations require operators of Boeing 747 aircraft to ensure that the modifications specified in either FAA AD 80-19-05 or Boeing SB No. 747-27-2204 are implemented to prevent unscheduled deployment of the wing leading edge flaps due to electrical faults. Operators must adhere to the compliance instructions provided in the referenced documents, ensuring that all necessary inspections, repairs, or replacements are conducted in accordance with these guidelines. Compliance must be verified and documented appropriately to demonstrate adherence to the directive.
Failure to comply with the AD/B747/25 directive can result in significant consequences. Under the Civil Aviation Regulations 1998, non-compliance with airworthiness directives is considered an offence. The Civil Aviation Act 1988 imposes penalties for such breaches, including fines of up to $275,000 for corporations and $55,000 for individuals. In addition to financial penalties, non-compliance can lead to operational restrictions, including the grounding of affected aircraft until the required modifications are made. These stringent measures are in place to ensure the safety and reliability of civil aviation operations.