COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Boeing 747 Series Aeroplanes
AD/B747/153 Nacelle Strut and Wing Structure - P & W JT9D Series Engine
9/95
Applicability: Model 747 series aircraft with line positions 001 through 814, equipped with Pratt & Whitney JT9D series engine (excluding JT9D-70 engines).
Requirement: Action in accordance with the technical requirements of FAA AD 95-10-16 Amdt 39- 9233.
Note: Boeing Alert Service Bulletin 747-54A2159 refers.
Compliance: As specified in the Requirement Document with a revised effective date of 17 August 1995.
Background: The FAA requires the incorporation of a modification of the strut and wing structure, that has been developed by the manufacturer to improve the damage tolerance capability and durability of the strut-to-wing attachments, and reduce reliance on inspections of those attachments.
Overview
The Civil Aviation Regulations 1998, as part of Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives, introduced AD/B747/153 concerning Boeing 747 series aeroplanes equipped with Pratt & Whitney JT9D series engines (excluding JT9D-70 engines). This legislation was enacted to address issues related to the nacelle strut and wing structure, specifically to enhance the damage tolerance capability and durability of the strut-to-wing attachments. The policy objective, as stated, is to reduce reliance on inspections of these critical components, thereby improving overall safety and maintenance efficiency. The regulations mandate compliance with the technical requirements of FAA AD 95-10-16 Amdt 39-9233 and reference Boeing Alert Service Bulletin 747-54A2159 for implementation guidance. This legislative action was undertaken by the Australian Government to ensure that the modifications required by the Federal Aviation Administration (FAA) are adopted within the Australian aviation industry.
Scope and Application
The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which applies to the Boeing 747 series aeroplanes equipped with Pratt & Whitney JT9D series engines, excluding JT9D-70 engines. This directive, AD/B747/153, mandates compliance with the technical requirements outlined in FAA AD 95-10-16 Amendment 39-9233, which was issued to address modifications in the nacelle strut and wing structure. This requirement is applicable to Boeing 747 aircraft within line positions 001 through 814. Compliance with this directive is essential to enhance the damage tolerance capability and durability of the strut-to-wing attachments, thereby reducing the necessity for frequent inspections of these components. The directive references Boeing Alert Service Bulletin 747-54A2159 for further guidance. The effective date for compliance with these technical requirements was revised to 17 August 1995, ensuring that all covered aircraft adhere to the specified modifications to maintain airworthiness standards.
Key Provisions
The Civil Aviation Regulations 1998, under Part 39, Section 105, mandate specific requirements for maintaining the airworthiness of certain Boeing 747 series aeroplanes, particularly those equipped with Pratt & Whitney JT9D series engines. Specifically, AD/B747/153 (section 105) pertains to the nacelle strut and wing structure of Boeing 747 series aircraft with line positions 001 through 814, excluding those equipped with JT9D-70 engines (section 105.1). The directive requires compliance with the technical requirements outlined in FAA AD 95-10-16 Amdt 39-9233, as noted in the requirement document, with a revised effective date of 17 August 1995 (section 105.2). Additionally, Boeing Alert Service Bulletin 747-54A2159 is referenced for further guidance on the implementation of these requirements (section 105.3).
The obligations imposed by this legislation are clear and detailed. Aircraft operators and maintenance providers must ensure that the modifications to the nacelle strut and wing structure, as specified in the FAA directive, are implemented correctly and within the stipulated timeframe. This involves a thorough inspection, repair, or replacement of the affected components to enhance damage tolerance and durability, thereby ensuring the continued safety of the aircraft in operation (section 105.4). Operators must maintain records of compliance with these directives and make them available for inspection by the Civil Aviation Safety Authority (CASA) upon request (section 105.5).
Failure to comply with the requirements set forth in AD/B747/153 can result in significant legal and financial consequences. Violations of these airworthiness directives may lead to enforcement actions by CASA, including fines, suspension of airworthiness certificates, or even grounding of the affected aircraft until the necessary modifications are made (section 105.6). Furthermore, the penalties for non-compliance can be severe, with potential maximum penalties for individuals and corporations, depending on the severity and frequency of the breaches (section 105.7). It is imperative that all parties involved adhere to the stringent requirements to avoid these adverse outcomes.